390143580921 has 6 divisors (see below), whose sum is σ = 563540728010. Its totient is φ = 260095720608.

The previous prime is 390143580913. The next prime is 390143580929. The reversal of 390143580921 is 129085341093.

It is a happy number.

390143580921 is a `hidden beast` number, since 3 + 9 + 0 + 1 + 43 + 580 + 9 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (390143580913) and next prime (390143580929).

It can be written as a sum of positive squares in only one way, i.e., 387554806521 + 2588774400 = 622539^2 + 50880^2 .

It is not a de Polignac number, because 390143580921 - 2³ = 390143580913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390143580929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21674643376 + ... + 21674643393.

Almost surely, 2^390143580921 is an apocalyptic number.

It is an amenable number.

390143580921 is a deficient number, since it is larger than the sum of its proper divisors (173397147089).

390143580921 is a wasteful number, since it uses less digits than its factorization.

390143580921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43349286775 (or 43349286772 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 390143580921 in words is "three hundred ninety billion, one hundred forty-three million, five hundred eighty thousand, nine hundred twenty-one".