99172646 has 8 divisors (see below), whose sum is σ = 151565904. Its totient is φ = 48650680.

The previous prime is 99172643. The next prime is 99172657. The reversal of 99172646 is 64627199.

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

It is a junction number, because it is equal to n+sod(n) for n = 99172597 and 99172606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99172643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467690 + ... + 467901.

It is an arithmetic number, because the mean of its divisors is an integer number (18945738).

Almost surely, 2^99172646 is an apocalyptic number.

99172646 is a deficient number, since it is larger than the sum of its proper divisors (52393258).

99172646 is a wasteful number, since it uses less digits than its factorization.

99172646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935646.

The product of its digits is 163296, while the sum is 44.

The square root of 99172646 is about 9958.5463798689. The cubic root of 99172646 is about 462.8752577537.

It can be divided in two parts, 991 and 72646, that added together give a palindrome (73637).

The spelling of 99172646 in words is "ninety-nine million, one hundred seventy-two thousand, six hundred forty-six".