74273657 has 4 divisors (see below), whose sum is σ = 74931060. Its totient is φ = 73616256.

The previous prime is 74273653. The next prime is 74273681. The reversal of 74273657 is 75637247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75637247 = 7 ⋅10805321.

It can be written as a sum of positive squares in 2 ways, for example, as 8404201 + 65869456 = 2899^2 + 8116^2 .

It is a cyclic number.

It is not a de Polignac number, because 74273657 - 2² = 74273653 is a prime.

It is a super-2 number, since 2×74273657² = 11033152248307298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74273651) 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, 328532 + ... + 328757.

It is an arithmetic number, because the mean of its divisors is an integer number (18732765).

Almost surely, 2^74273657 is an apocalyptic number.

It is an amenable number.

74273657 is a deficient number, since it is larger than the sum of its proper divisors (657403).

74273657 is a wasteful number, since it uses less digits than its factorization.

74273657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657402.

The product of its digits is 246960, while the sum is 41.

The square root of 74273657 is about 8618.2165788520. The cubic root of 74273657 is about 420.3505331375.

The spelling of 74273657 in words is "seventy-four million, two hundred seventy-three thousand, six hundred fifty-seven".