87922813 has 32 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 73170240.

The previous prime is 87922811. The next prime is 87922817. The reversal of 87922813 is 31822978.

It is not a de Polignac number, because 87922813 - 2¹ = 87922811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87922811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1059270 + ... + 1059352.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^87922813 is an apocalyptic number.

87922813 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

87922813 is a deficient number, since it is larger than the sum of its proper divisors (16586627).

87922813 is a wasteful number, since it uses less digits than its factorization.

87922813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its digits is 48384, while the sum is 40.

The square root of 87922813 is about 9376.7165361869. The cubic root of 87922813 is about 444.6659328370.

The spelling of 87922813 in words is "eighty-seven million, nine hundred twenty-two thousand, eight hundred thirteen".