99647961 has 16 divisors (see below), whose sum is σ = 154113024. Its totient is φ = 56091024.

The previous prime is 99647941. The next prime is 99647963. The reversal of 99647961 is 16974699.

It is not a de Polignac number, because 99647961 - 2⁷ = 99647833 is a prime.

It is a super-2 number, since 2×99647961² = 19859432262915042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99647963) 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 15 ways as a sum of consecutive naturals, for example, 34005 + ... + 36818.

It is an arithmetic number, because the mean of its divisors is an integer number (9632064).

Almost surely, 2^99647961 is an apocalyptic number.

It is an amenable number.

99647961 is a deficient number, since it is larger than the sum of its proper divisors (54465063).

99647961 is a wasteful number, since it uses less digits than its factorization.

99647961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70900.

The product of its digits is 734832, while the sum is 51.

The square root of 99647961 is about 9982.3825312397. The cubic root of 99647961 is about 463.6135695235.

The spelling of 99647961 in words is "ninety-nine million, six hundred forty-seven thousand, nine hundred sixty-one".