74945138 has 4 divisors (see below), whose sum is σ = 112417710. Its totient is φ = 37472568.

The previous prime is 74945137. The next prime is 74945159. The reversal of 74945138 is 83154947.

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

It can be written as a sum of positive squares in only one way, i.e., 64915249 + 10029889 = 8057^2 + 3167^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74945095 and 74945104.

It is not an unprimeable number, because it can be changed into a prime (74945137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18736283 + ... + 18736286.

Almost surely, 2^74945138 is an apocalyptic number.

74945138 is a deficient number, since it is larger than the sum of its proper divisors (37472572).

74945138 is a wasteful number, since it uses less digits than its factorization.

74945138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37472571.

The product of its digits is 120960, while the sum is 41.

The square root of 74945138 is about 8657.0859993418. The cubic root of 74945138 is about 421.6134800062.

The spelling of 74945138 in words is "seventy-four million, nine hundred forty-five thousand, one hundred thirty-eight".