99972955 has 4 divisors (see below), whose sum is σ = 119967552. Its totient is φ = 79978360.

The previous prime is 99972913. The next prime is 99972967. The reversal of 99972955 is 55927999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55927999 = 31 ⋅1804129.

It is not a de Polignac number, because 99972955 - 2¹¹ = 99970907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99972896 and 99972905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9997291 + ... + 9997300.

It is an arithmetic number, because the mean of its divisors is an integer number (29991888).

Almost surely, 2^99972955 is an apocalyptic number.

99972955 is a deficient number, since it is larger than the sum of its proper divisors (19994597).

99972955 is a wasteful number, since it uses less digits than its factorization.

99972955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19994596.

The product of its digits is 2296350, while the sum is 55.

The square root of 99972955 is about 9998.6476585586. The cubic root of 99972955 is about 464.1170356651.

It can be divided in two parts, 9 and 9972955, that added together give a square (9972964 = 3158²).

The spelling of 99972955 in words is "ninety-nine million, nine hundred seventy-two thousand, nine hundred fifty-five".