390257061 has 4 divisors (see below), whose sum is σ = 520342752. Its totient is φ = 260171372.

The previous prime is 390257057. The next prime is 390257069. The reversal of 390257061 is 160752093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 390257061 - 2² = 390257057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390257069) 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, 65042841 + ... + 65042846.

It is an arithmetic number, because the mean of its divisors is an integer number (130085688).

Almost surely, 2^390257061 is an apocalyptic number.

It is an amenable number.

390257061 is a deficient number, since it is larger than the sum of its proper divisors (130085691).

390257061 is a wasteful number, since it uses less digits than its factorization.

390257061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130085690.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 390257061 is about 19754.9249808750. The cubic root of 390257061 is about 730.7748456183.

The spelling of 390257061 in words is "three hundred ninety million, two hundred fifty-seven thousand, sixty-one".