74689231 has 4 divisors (see below), whose sum is σ = 75741264. Its totient is φ = 73637200.

The previous prime is 74689229. The next prime is 74689289. The reversal of 74689231 is 13298647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13298647 = 89 ⋅149423.

It is a cyclic number.

It is not a de Polignac number, because 74689231 - 2¹ = 74689229 is a prime.

It is a super-2 number, since 2×74689231² = 11156962454742722, 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 (74629231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525910 + ... + 526051.

It is an arithmetic number, because the mean of its divisors is an integer number (18935316).

Almost surely, 2^74689231 is an apocalyptic number.

74689231 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

74689231 is the 4620-th centered heptagonal number.

74689231 is a deficient number, since it is larger than the sum of its proper divisors (1052033).

74689231 is a wasteful number, since it uses less digits than its factorization.

74689231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052032.

The product of its digits is 72576, while the sum is 40.

The square root of 74689231 is about 8642.2931563330. The cubic root of 74689231 is about 421.1330535607.

The spelling of 74689231 in words is "seventy-four million, six hundred eighty-nine thousand, two hundred thirty-one".