3990929148361 has 3 divisors (see below), whose sum is σ = 3990931146093. Its totient is φ = 3990927150630.

The previous prime is 3990929148343. The next prime is 3990929148373. The reversal of 3990929148361 is 1638419290993.

It is a happy number.

The square root of 3990929148361 is 1997731.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 3990929148361 - 2²⁵ = 3990895593929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3990929148293 and 3990929148302.

It is not an unprimeable number, because it can be changed into a prime (3990929145361) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 998866 + ... + 2996596.

It is an arithmetic number, because the mean of its divisors is an integer number (1330310382031).

Almost surely, 2^{3990929148361} is an apocalyptic number.

3990929148361 is the 1997731-st square number.

3990929148361 is the 998866-th centered octagonal number.

It is an amenable number.

3990929148361 is a deficient number, since it is larger than the sum of its proper divisors (1997732).

3990929148361 is an frugal number, since it uses more digits than its factorization.

3990929148361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995462 (or 1997731 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 64.

Multiplying 3990929148361 by its sum of digits (64), we get a square (255419465495104 = 15981848²).

The spelling of 3990929148361 in words is "three trillion, nine hundred ninety billion, nine hundred twenty-nine million, one hundred forty-eight thousand, three hundred sixty-one".