87412831 has 4 divisors (see below), whose sum is σ = 95359464. Its totient is φ = 79466200.

The previous prime is 87412813. The next prime is 87412841. The reversal of 87412831 is 13821478.

It is a happy number.

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

It is not a de Polignac number, because 87412831 - 2¹¹ = 87410783 is a prime.

It is a super-2 number, since 2×87412831² = 15282006046869122, 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 (87412841) 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, 3973300 + ... + 3973321.

It is an arithmetic number, because the mean of its divisors is an integer number (23839866).

Almost surely, 2^87412831 is an apocalyptic number.

87412831 is a deficient number, since it is larger than the sum of its proper divisors (7946633).

87412831 is a wasteful number, since it uses less digits than its factorization.

87412831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946632.

The product of its digits is 10752, while the sum is 34.

The square root of 87412831 is about 9349.4829268789. The cubic root of 87412831 is about 443.8045276907.

The spelling of 87412831 in words is "eighty-seven million, four hundred twelve thousand, eight hundred thirty-one".