99997042 has 4 divisors (see below), whose sum is σ = 149995566. Its totient is φ = 49998520.

The previous prime is 99997033. The next prime is 99997063. The reversal of 99997042 is 24079999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24079999 = 73 ⋅329863.

It can be written as a sum of positive squares in only one way, i.e., 59305401 + 40691641 = 7701^2 + 6379^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999259 + ... + 24999262.

Almost surely, 2^99997042 is an apocalyptic number.

99997042 is a deficient number, since it is larger than the sum of its proper divisors (49998524).

99997042 is a wasteful number, since it uses less digits than its factorization.

99997042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49998523.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 99997042 is about 9999.8520989063. The cubic root of 99997042 is about 464.1543067096.

The spelling of 99997042 in words is "ninety-nine million, nine hundred ninety-seven thousand, forty-two".