99645865 has 8 divisors (see below), whose sum is σ = 130445568. Its totient is φ = 72469680.

The previous prime is 99645853. The next prime is 99645877. The reversal of 99645865 is 56854699.

It is an interprime number because it is at equal distance from previous prime (99645853) and next prime (99645877).

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

It is not a de Polignac number, because 99645865 - 2²¹ = 97548713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905817 + ... + 905926.

It is an arithmetic number, because the mean of its divisors is an integer number (16305696).

Almost surely, 2^99645865 is an apocalyptic number.

It is an amenable number.

99645865 is a deficient number, since it is larger than the sum of its proper divisors (30799703).

99645865 is a wasteful number, since it uses less digits than its factorization.

99645865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811759.

The product of its digits is 2332800, while the sum is 52.

The square root of 99645865 is about 9982.2775457307. The cubic root of 99645865 is about 463.6103189440.

The spelling of 99645865 in words is "ninety-nine million, six hundred forty-five thousand, eight hundred sixty-five".