99157987 has 2 divisors, whose sum is σ = 99157988. Its totient is φ = 99157986.

The previous prime is 99157969. The next prime is 99157999. The reversal of 99157987 is 78975199.

It is a strong prime.

It is an emirp because it is prime and its reverse (78975199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99157987 - 2¹¹ = 99155939 is a prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49578993 + 49578994.

It is an arithmetic number, because the mean of its divisors is an integer number (49578994).

Almost surely, 2^99157987 is an apocalyptic number.

99157987 is a deficient number, since it is larger than the sum of its proper divisors (1).

99157987 is an equidigital number, since it uses as much as digits as its factorization.

99157987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 55.

The square root of 99157987 is about 9957.8103516787. The cubic root of 99157987 is about 462.8524503130.

The spelling of 99157987 in words is "ninety-nine million, one hundred fifty-seven thousand, nine hundred eighty-seven".