74739961 has 4 divisors (see below), whose sum is σ = 76006800. Its totient is φ = 73473124.

The previous prime is 74739913. The next prime is 74739967. The reversal of 74739961 is 16993747.

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 a cyclic number.

It is not a de Polignac number, because 74739961 - 2⁹ = 74739449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74739967) 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, 633331 + ... + 633448.

It is an arithmetic number, because the mean of its divisors is an integer number (19001700).

Almost surely, 2^74739961 is an apocalyptic number.

It is an amenable number.

74739961 is a deficient number, since it is larger than the sum of its proper divisors (1266839).

74739961 is a wasteful number, since it uses less digits than its factorization.

74739961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266838.

The product of its digits is 285768, while the sum is 46.

The square root of 74739961 is about 8645.2276430410. The cubic root of 74739961 is about 421.2283785244.

The spelling of 74739961 in words is "seventy-four million, seven hundred thirty-nine thousand, nine hundred sixty-one".