74235981 has 4 divisors (see below), whose sum is σ = 98981312. Its totient is φ = 49490652.

The previous prime is 74235971. The next prime is 74235989. The reversal of 74235981 is 18953247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 74235981 - 2¹⁷ = 74104909 is a prime.

It is a super-2 number, since 2×74235981² = 11021961750064722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74235989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12372661 + ... + 12372666.

It is an arithmetic number, because the mean of its divisors is an integer number (24745328).

Almost surely, 2^74235981 is an apocalyptic number.

It is an amenable number.

74235981 is a deficient number, since it is larger than the sum of its proper divisors (24745331).

74235981 is a wasteful number, since it uses less digits than its factorization.

74235981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24745330.

The product of its digits is 60480, while the sum is 39.

The square root of 74235981 is about 8616.0304665200. The cubic root of 74235981 is about 420.2794455499.

The spelling of 74235981 in words is "seventy-four million, two hundred thirty-five thousand, nine hundred eighty-one".