74921823 has 12 divisors (see below), whose sum is σ = 111711808. Its totient is φ = 48336480.

The previous prime is 74921797. The next prime is 74921837. The reversal of 74921823 is 32812947.

It is a de Polignac number, because none of the positive numbers 2^k-74921823 is a prime.

It is a super-2 number, since 2×74921823² = 11226559123286658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74921843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133990 + ... + 134547.

Almost surely, 2^74921823 is an apocalyptic number.

74921823 is a deficient number, since it is larger than the sum of its proper divisors (36789985).

74921823 is a wasteful number, since it uses less digits than its factorization.

74921823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268574 (or 268571 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 74921823 is about 8655.7393098452. The cubic root of 74921823 is about 421.5697549647.

The spelling of 74921823 in words is "seventy-four million, nine hundred twenty-one thousand, eight hundred twenty-three".