87415969 has 2 divisors, whose sum is σ = 87415970. Its totient is φ = 87415968.

The previous prime is 87415957. The next prime is 87415987. The reversal of 87415969 is 96951478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62615569 + 24800400 = 7913^2 + 4980^2 .

It is a cyclic number.

It is not a de Polignac number, because 87415969 - 2⁷ = 87415841 is a prime.

It is a super-2 number, since 2×87415969² = 15283103272417922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87415169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43707984 + 43707985.

It is an arithmetic number, because the mean of its divisors is an integer number (43707985).

Almost surely, 2^87415969 is an apocalyptic number.

It is an amenable number.

87415969 is a deficient number, since it is larger than the sum of its proper divisors (1).

87415969 is an equidigital number, since it uses as much as digits as its factorization.

87415969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 87415969 is about 9349.6507421401. The cubic root of 87415969 is about 443.8098382839.

The spelling of 87415969 in words is "eighty-seven million, four hundred fifteen thousand, nine hundred sixty-nine".