74744137 has 10 divisors (see below), whose sum is σ = 81003538. Its totient is φ = 68968224.

The previous prime is 74744129. The next prime is 74744149. The reversal of 74744137 is 73144747.

It can be written as a sum of positive squares in 5 ways, for example, as 42889401 + 31854736 = 6549^2 + 5644^2 .

It is not a de Polignac number, because 74744137 - 2³ = 74744129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74744096 and 74744105.

It is not an unprimeable number, because it can be changed into a prime (74744237) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27253 + ... + 29869.

Almost surely, 2^74744137 is an apocalyptic number.

It is an amenable number.

74744137 is a deficient number, since it is larger than the sum of its proper divisors (6259401).

74744137 is an frugal number, since it uses more digits than its factorization.

74744137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669 (or 2630 counting only the distinct ones).

The product of its digits is 65856, while the sum is 37.

The square root of 74744137 is about 8645.4691602018. The cubic root of 74744137 is about 421.2362235777.

It can be divided in two parts, 7474 and 4137, that added together give a palindrome (11611).

The spelling of 74744137 in words is "seventy-four million, seven hundred forty-four thousand, one hundred thirty-seven".