87768539 has 2 divisors, whose sum is σ = 87768540. Its totient is φ = 87768538.

The previous prime is 87768523. The next prime is 87768589. The reversal of 87768539 is 93586778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87768539 - 2⁴ = 87768523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87768509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43884269 + 43884270.

It is an arithmetic number, because the mean of its divisors is an integer number (43884270).

Almost surely, 2^87768539 is an apocalyptic number.

87768539 is a deficient number, since it is larger than the sum of its proper divisors (1).

87768539 is an equidigital number, since it uses as much as digits as its factorization.

87768539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The square root of 87768539 is about 9368.4864839525. The cubic root of 87768539 is about 444.4057024818.

The spelling of 87768539 in words is "eighty-seven million, seven hundred sixty-eight thousand, five hundred thirty-nine".