390852901 has 4 divisors (see below), whose sum is σ = 390894412. Its totient is φ = 390811392.

The previous prime is 390852887. The next prime is 390852907. The reversal of 390852901 is 109258093.

It is a Cunningham number, because it is equal to 19770²+1.

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 2 ways, for example, as 195272676 + 195580225 = 13974^2 + 13985^2 .

It is a cyclic number.

It is not a de Polignac number, because 390852901 - 2¹³ = 390844709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390852907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901 + ... + 27973.

It is an arithmetic number, because the mean of its divisors is an integer number (97723603).

Almost surely, 2^390852901 is an apocalyptic number.

It is an amenable number.

390852901 is a deficient number, since it is larger than the sum of its proper divisors (41511).

390852901 is a wasteful number, since it uses less digits than its factorization.

390852901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41510.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 390852901 is about 19770.0000252908. Note that the first 4 decimals coincide. The cubic root of 390852901 is about 731.1465693826.

The spelling of 390852901 in words is "three hundred ninety million, eight hundred fifty-two thousand, nine hundred one".