87907489 has 2 divisors, whose sum is σ = 87907490. Its totient is φ = 87907488.

The previous prime is 87907451. The next prime is 87907499. The reversal of 87907489 is 98470978.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54464400 + 33443089 = 7380^2 + 5783^2 .

It is a cyclic number.

It is not a de Polignac number, because 87907489 - 2⁷ = 87907361 is a prime.

It is not a weakly prime, because it can be changed into another prime (87907429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43953744 + 43953745.

It is an arithmetic number, because the mean of its divisors is an integer number (43953745).

Almost surely, 2^87907489 is an apocalyptic number.

It is an amenable number.

87907489 is a deficient number, since it is larger than the sum of its proper divisors (1).

87907489 is an equidigital number, since it uses as much as digits as its factorization.

87907489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 87907489 is about 9375.8993701938. The cubic root of 87907489 is about 444.6400978406.

The spelling of 87907489 in words is "eighty-seven million, nine hundred seven thousand, four hundred eighty-nine".