74512397 has 4 divisors (see below), whose sum is σ = 77081820. Its totient is φ = 71942976.

The previous prime is 74512391. The next prime is 74512423. The reversal of 74512397 is 79321547.

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 54922921 + 19589476 = 7411^2 + 4426^2 .

It is a cyclic number.

It is not a de Polignac number, because 74512397 - 2⁴ = 74512381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74512397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74512391) 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, 1284668 + ... + 1284725.

It is an arithmetic number, because the mean of its divisors is an integer number (19270455).

Almost surely, 2^74512397 is an apocalyptic number.

It is an amenable number.

74512397 is a deficient number, since it is larger than the sum of its proper divisors (2569423).

74512397 is a wasteful number, since it uses less digits than its factorization.

74512397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569422.

The product of its digits is 52920, while the sum is 38.

The square root of 74512397 is about 8632.0563598716. The cubic root of 74512397 is about 420.8004331325.

The spelling of 74512397 in words is "seventy-four million, five hundred twelve thousand, three hundred ninety-seven".