87180623 has 2 divisors, whose sum is σ = 87180624. Its totient is φ = 87180622.

The previous prime is 87180619. The next prime is 87180647. The reversal of 87180623 is 32608178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87180623 - 2² = 87180619 is a prime.

It is a super-2 number, since 2×87180623² = 15200922053336258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87180673) 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 as a sum of consecutive naturals, namely, 43590311 + 43590312.

It is an arithmetic number, because the mean of its divisors is an integer number (43590312).

Almost surely, 2^87180623 is an apocalyptic number.

87180623 is a deficient number, since it is larger than the sum of its proper divisors (1).

87180623 is an equidigital number, since it uses as much as digits as its factorization.

87180623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87180623 is about 9337.0564419414. The cubic root of 87180623 is about 443.4111973714.

The spelling of 87180623 in words is "eighty-seven million, one hundred eighty thousand, six hundred twenty-three".