74744747 has 24 divisors (see below), whose sum is σ = 95861232. Its totient is φ = 57624000.

The previous prime is 74744729. The next prime is 74744749.

74744747 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74744747 - 2⁸ = 74744491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74744698 and 74744707.

It is not an unprimeable number, because it can be changed into a prime (74744749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53753 + ... + 55125.

It is an arithmetic number, because the mean of its divisors is an integer number (3994218).

Almost surely, 2^74744747 is an apocalyptic number.

74744747 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

74744747 is a deficient number, since it is larger than the sum of its proper divisors (21116485).

74744747 is a wasteful number, since it uses less digits than its factorization.

74744747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499 (or 1492 counting only the distinct ones).

The product of its digits is 614656, while the sum is 44.

The square root of 74744747 is about 8645.5044387242. The cubic root of 74744747 is about 421.2373695022.

It can be divided in two parts, 7474 and 4747, that added together give a palindrome (12221).

The spelling of 74744747 in words is "seventy-four million, seven hundred forty-four thousand, seven hundred forty-seven".