74940161 has 4 divisors (see below), whose sum is σ = 78884400. Its totient is φ = 70995924.

The previous prime is 74940149. The next prime is 74940181. The reversal of 74940161 is 16104947.

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 74940161 - 2²⁶ = 7831297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74940181) 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, 1972091 + ... + 1972128.

It is an arithmetic number, because the mean of its divisors is an integer number (19721100).

Almost surely, 2^74940161 is an apocalyptic number.

It is an amenable number.

74940161 is a deficient number, since it is larger than the sum of its proper divisors (3944239).

74940161 is a wasteful number, since it uses less digits than its factorization.

74940161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944238.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 74940161 is about 8656.7985421864. The cubic root of 74940161 is about 421.6041468824.

The spelling of 74940161 in words is "seventy-four million, nine hundred forty thousand, one hundred sixty-one".