99651989 has 8 divisors (see below), whose sum is σ = 103305888. Its totient is φ = 96048720.

The previous prime is 99651983. The next prime is 99651991. The reversal of 99651989 is 98915699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99651989 - 2⁴ = 99651973 is a prime.

It is a super-2 number, since 2×99651989² = 19861037823312242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99651983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8627 + ... + 16544.

It is an arithmetic number, because the mean of its divisors is an integer number (12913236).

Almost surely, 2^99651989 is an apocalyptic number.

It is an amenable number.

99651989 is a deficient number, since it is larger than the sum of its proper divisors (3653899).

99651989 is a wasteful number, since it uses less digits than its factorization.

99651989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25315.

The product of its digits is 1574640, while the sum is 56.

The square root of 99651989 is about 9982.5842846429. The cubic root of 99651989 is about 463.6198162153.

The spelling of 99651989 in words is "ninety-nine million, six hundred fifty-one thousand, nine hundred eighty-nine".