87704131 has 2 divisors, whose sum is σ = 87704132. Its totient is φ = 87704130.

The previous prime is 87704119. The next prime is 87704147. The reversal of 87704131 is 13140778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87704131 - 2¹³ = 87695939 is a prime.

It is a super-2 number, since 2×87704131² = 15384029188930322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87704093 and 87704102.

It is not a weakly prime, because it can be changed into another prime (87704161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43852065 + 43852066.

It is an arithmetic number, because the mean of its divisors is an integer number (43852066).

Almost surely, 2^87704131 is an apocalyptic number.

87704131 is a deficient number, since it is larger than the sum of its proper divisors (1).

87704131 is an equidigital number, since it uses as much as digits as its factorization.

87704131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 87704131 is about 9365.0483714714. The cubic root of 87704131 is about 444.2969684286.

The spelling of 87704131 in words is "eighty-seven million, seven hundred four thousand, one hundred thirty-one".