89315987 has 2 divisors, whose sum is σ = 89315988. Its totient is φ = 89315986.

The previous prime is 89315959. The next prime is 89316001. The reversal of 89315987 is 78951398.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89315987 - 2¹⁰ = 89314963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89315957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44657993 + 44657994.

It is an arithmetic number, because the mean of its divisors is an integer number (44657994).

Almost surely, 2^89315987 is an apocalyptic number.

89315987 is a deficient number, since it is larger than the sum of its proper divisors (1).

89315987 is an equidigital number, since it uses as much as digits as its factorization.

89315987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 50.

The square root of 89315987 is about 9450.7135709427. The cubic root of 89315987 is about 447.0022754949.

The spelling of 89315987 in words is "eighty-nine million, three hundred fifteen thousand, nine hundred eighty-seven".