39315354961 has 3 divisors (see below), whose sum is σ = 39315553243. Its totient is φ = 39315156680.

The previous prime is 39315354941. The next prime is 39315354979. The reversal of 39315354961 is 16945351393.

It is a happy number.

The square root of 39315354961 is 198281.

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 can be written as a sum of positive squares in only one way, i.e., 39112577361 + 202777600 = 197769^2 + 14240^2 .

It is not a de Polignac number, because 39315354961 - 2⁷ = 39315354833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39315354941) 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, 99141 + ... + 297421.

Almost surely, 2^39315354961 is an apocalyptic number.

39315354961 is the 198281-st square number.

39315354961 is the 99141-st centered octagonal number.

It is an amenable number.

39315354961 is a deficient number, since it is larger than the sum of its proper divisors (198282).

39315354961 is an frugal number, since it uses more digits than its factorization.

39315354961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396562 (or 198281 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 49.

Multiplying 39315354961 by its sum of digits (49), we get a square (1926452393089 = 1387967²).

The spelling of 39315354961 in words is "thirty-nine billion, three hundred fifteen million, three hundred fifty-four thousand, nine hundred sixty-one".