406887031 has 4 divisors (see below), whose sum is σ = 407067232. Its totient is φ = 406706832.

The previous prime is 406887017. The next prime is 406887053. The reversal of 406887031 is 130788604.

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 406887031 - 2¹⁷ = 406755959 is a prime.

It is a super-2 number, since 2×406887031² = 331114111991989922, which 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 (406887001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86670 + ... + 91243.

It is an arithmetic number, because the mean of its divisors is an integer number (101766808).

Almost surely, 2^406887031 is an apocalyptic number.

406887031 is a deficient number, since it is larger than the sum of its proper divisors (180201).

406887031 is a wasteful number, since it uses less digits than its factorization.

406887031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180200.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 406887031 is about 20171.4409748040. The cubic root of 406887031 is about 741.0109332589.

The spelling of 406887031 in words is "four hundred six million, eight hundred eighty-seven thousand, thirty-one".