99974421 has 12 divisors (see below), whose sum is σ = 146236480. Its totient is φ = 65805480.

The previous prime is 99974419. The next prime is 99974423. The reversal of 99974421 is 12447999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99974419) and next prime (99974423).

It is not a de Polignac number, because 99974421 - 2¹ = 99974419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99974423) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 69595 + ... + 71016.

Almost surely, 2^99974421 is an apocalyptic number.

It is an amenable number.

99974421 is a deficient number, since it is larger than the sum of its proper divisors (46262059).

99974421 is a wasteful number, since it uses less digits than its factorization.

99974421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140696 (or 140693 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 99974421 is about 9998.7209682039. The cubic root of 99974421 is about 464.1193042528.

The spelling of 99974421 in words is "ninety-nine million, nine hundred seventy-four thousand, four hundred twenty-one".