87174137 has 2 divisors, whose sum is σ = 87174138. Its totient is φ = 87174136.

The previous prime is 87174133. The next prime is 87174151. The reversal of 87174137 is 73147178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79905721 + 7268416 = 8939^2 + 2696^2 .

It is a cyclic number.

It is not a de Polignac number, because 87174137 - 2² = 87174133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87174137.

It is not a weakly prime, because it can be changed into another prime (87174133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43587068 + 43587069.

It is an arithmetic number, because the mean of its divisors is an integer number (43587069).

Almost surely, 2^87174137 is an apocalyptic number.

It is an amenable number.

87174137 is a deficient number, since it is larger than the sum of its proper divisors (1).

87174137 is an equidigital number, since it uses as much as digits as its factorization.

87174137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 38.

The square root of 87174137 is about 9336.7091097453. The cubic root of 87174137 is about 443.4002009051.

The spelling of 87174137 in words is "eighty-seven million, one hundred seventy-four thousand, one hundred thirty-seven".