99972134 has 4 divisors (see below), whose sum is σ = 149958204. Its totient is φ = 49986066.

The previous prime is 99972079. The next prime is 99972157. The reversal of 99972134 is 43127999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43127999 = 47 ⋅917617.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24993032 + ... + 24993035.

It is an arithmetic number, because the mean of its divisors is an integer number (37489551).

Almost surely, 2^99972134 is an apocalyptic number.

99972134 is a deficient number, since it is larger than the sum of its proper divisors (49986070).

99972134 is a wasteful number, since it uses less digits than its factorization.

99972134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49986069.

The product of its digits is 122472, while the sum is 44.

The square root of 99972134 is about 9998.6066029222. The cubic root of 99972134 is about 464.1157651844.

The spelling of 99972134 in words is "ninety-nine million, nine hundred seventy-two thousand, one hundred thirty-four".