74497645 has 4 divisors (see below), whose sum is σ = 89397180. Its totient is φ = 59598112.

The previous prime is 74497637. The next prime is 74497663. The reversal of 74497645 is 54679447.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40729924 + 33767721 = 6382^2 + 5811^2 .

It is a cyclic number.

It is not a de Polignac number, because 74497645 - 2³ = 74497637 is a prime.

It is a super-3 number, since 3×74497645³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 74497595 and 74497604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7449760 + ... + 7449769.

It is an arithmetic number, because the mean of its divisors is an integer number (22349295).

Almost surely, 2^74497645 is an apocalyptic number.

It is an amenable number.

74497645 is a deficient number, since it is larger than the sum of its proper divisors (14899535).

74497645 is a wasteful number, since it uses less digits than its factorization.

74497645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14899534.

The product of its digits is 846720, while the sum is 46.

The square root of 74497645 is about 8631.2018282508. The cubic root of 74497645 is about 420.7726612093.

It can be divided in two parts, 744 and 97645, that added together give a palindrome (98389).

The spelling of 74497645 in words is "seventy-four million, four hundred ninety-seven thousand, six hundred forty-five".