406031393687 has 4 divisors (see below), whose sum is σ = 417005215176. Its totient is φ = 395057572200.

The previous prime is 406031393671. The next prime is 406031393701. The reversal of 406031393687 is 786393130604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406031393687 - 2⁴ = 406031393671 is a prime.

It is a super-2 number, since 2×406031393687² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406031392687) 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, 5486910689 + ... + 5486910762.

It is an arithmetic number, because the mean of its divisors is an integer number (104251303794).

Almost surely, 2^406031393687 is an apocalyptic number.

406031393687 is a deficient number, since it is larger than the sum of its proper divisors (10973821489).

406031393687 is a wasteful number, since it uses less digits than its factorization.

406031393687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10973821488.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 406031393687 in words is "four hundred six billion, thirty-one million, three hundred ninety-three thousand, six hundred eighty-seven".