99987907 has 2 divisors, whose sum is σ = 99987908. Its totient is φ = 99987906.

The previous prime is 99987893. The next prime is 99987917. The reversal of 99987907 is 70978999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99987907 - 2⁷ = 99987779 is a prime.

It is not a weakly prime, because it can be changed into another prime (99987917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993953 + 49993954.

It is an arithmetic number, because the mean of its divisors is an integer number (49993954).

Almost surely, 2^99987907 is an apocalyptic number.

99987907 is a deficient number, since it is larger than the sum of its proper divisors (1).

99987907 is an equidigital number, since it uses as much as digits as its factorization.

99987907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The square root of 99987907 is about 9999.3953317188. The cubic root of 99987907 is about 464.1401723624.

The spelling of 99987907 in words is "ninety-nine million, nine hundred eighty-seven thousand, nine hundred seven".