99307989 has 12 divisors (see below), whose sum is σ = 156485472. Its totient is φ = 60186600.

The previous prime is 99307987. The next prime is 99307991. The reversal of 99307989 is 98970399.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99307987) and next prime (99307991).

It is not a de Polignac number, because 99307989 - 2¹ = 99307987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99307987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 501457 + ... + 501654.

It is an arithmetic number, because the mean of its divisors is an integer number (13040456).

Almost surely, 2^99307989 is an apocalyptic number.

99307989 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

99307989 is a deficient number, since it is larger than the sum of its proper divisors (57177483).

99307989 is a wasteful number, since it uses less digits than its factorization.

99307989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003128 (or 1003125 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 99307989 is about 9965.3393820783. The cubic root of 99307989 is about 463.0857272451.

The spelling of 99307989 in words is "ninety-nine million, three hundred seven thousand, nine hundred eighty-nine".