99307987 has 2 divisors, whose sum is σ = 99307988. Its totient is φ = 99307986.

The previous prime is 99307961. The next prime is 99307991. The reversal of 99307987 is 78970399.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99307987 - 2¹⁵ = 99275219 is a prime.

It is not a weakly prime, because it can be changed into another prime (99307937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49653993 + 49653994.

It is an arithmetic number, because the mean of its divisors is an integer number (49653994).

Almost surely, 2^99307987 is an apocalyptic number.

99307987 is a deficient number, since it is larger than the sum of its proper divisors (1).

99307987 is an equidigital number, since it uses as much as digits as its factorization.

99307987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 99307987 is about 9965.3392817305. The cubic root of 99307987 is about 463.0857241363.

The spelling of 99307987 in words is "ninety-nine million, three hundred seven thousand, nine hundred eighty-seven".