390861428537 has 4 divisors (see below), whose sum is σ = 393845103696. Its totient is φ = 387877753380.

The previous prime is 390861428533. The next prime is 390861428579. The reversal of 390861428537 is 735824168093.

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 390861428537 - 2² = 390861428533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390861428533) 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, 1491837383 + ... + 1491837644.

It is an arithmetic number, because the mean of its divisors is an integer number (98461275924).

It is a 1-persistent number, because it is pandigital, but 2⋅390861428537 = 781722857074 is not.

Almost surely, 2^390861428537 is an apocalyptic number.

It is an amenable number.

390861428537 is a deficient number, since it is larger than the sum of its proper divisors (2983675159).

390861428537 is a wasteful number, since it uses less digits than its factorization.

390861428537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983675158.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 390861428537 in words is "three hundred ninety billion, eight hundred sixty-one million, four hundred twenty-eight thousand, five hundred thirty-seven".