99971042 has 4 divisors (see below), whose sum is σ = 149956566. Its totient is φ = 49985520.

The previous prime is 99971023. The next prime is 99971051. The reversal of 99971042 is 24017999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 88755241 + 11215801 = 9421^2 + 3349^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24992759 + ... + 24992762.

Almost surely, 2^99971042 is an apocalyptic number.

99971042 is a deficient number, since it is larger than the sum of its proper divisors (49985524).

99971042 is a wasteful number, since it uses less digits than its factorization.

99971042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49985523.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 99971042 is about 9998.5519951641. The cubic root of 99971042 is about 464.1140753260.

The spelling of 99971042 in words is "ninety-nine million, nine hundred seventy-one thousand, forty-two".