74961139 has 4 divisors (see below), whose sum is σ = 81775800. Its totient is φ = 68146480.

The previous prime is 74961127. The next prime is 74961167. The reversal of 74961139 is 93116947.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74961139 - 2⁷ = 74961011 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74961119) 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, 3407314 + ... + 3407335.

It is an arithmetic number, because the mean of its divisors is an integer number (20443950).

Almost surely, 2^74961139 is an apocalyptic number.

74961139 is a deficient number, since it is larger than the sum of its proper divisors (6814661).

74961139 is a wasteful number, since it uses less digits than its factorization.

74961139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6814660.

The product of its digits is 40824, while the sum is 40.

The square root of 74961139 is about 8658.0101062542. The cubic root of 74961139 is about 421.6434830965.

The spelling of 74961139 in words is "seventy-four million, nine hundred sixty-one thousand, one hundred thirty-nine".