87674557 has 2 divisors, whose sum is σ = 87674558. Its totient is φ = 87674556.

The previous prime is 87674537. The next prime is 87674579. The reversal of 87674557 is 75547678.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87497316 + 177241 = 9354^2 + 421^2 .

It is a cyclic number.

It is not a de Polignac number, because 87674557 - 2⁷ = 87674429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87674557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87674537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43837278 + 43837279.

It is an arithmetic number, because the mean of its divisors is an integer number (43837279).

Almost surely, 2^87674557 is an apocalyptic number.

It is an amenable number.

87674557 is a deficient number, since it is larger than the sum of its proper divisors (1).

87674557 is an equidigital number, since it uses as much as digits as its factorization.

87674557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1646400, while the sum is 49.

The square root of 87674557 is about 9363.4692822693. The cubic root of 87674557 is about 444.2470235530.

The spelling of 87674557 in words is "eighty-seven million, six hundred seventy-four thousand, five hundred fifty-seven".