74972797 has 4 divisors (see below), whose sum is σ = 74990140. Its totient is φ = 74955456.

The previous prime is 74972783. The next prime is 74972819. The reversal of 74972797 is 79727947.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 30096196 + 44876601 = 5486^2 + 6699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74972797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74972717) 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, 3643 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (18747535).

Almost surely, 2^74972797 is an apocalyptic number.

It is an amenable number.

74972797 is a deficient number, since it is larger than the sum of its proper divisors (17343).

74972797 is an equidigital number, since it uses as much as digits as its factorization.

74972797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17342.

The product of its digits is 1555848, while the sum is 52.

The square root of 74972797 is about 8658.6833294676. The cubic root of 74972797 is about 421.6653400435.

The spelling of 74972797 in words is "seventy-four million, nine hundred seventy-two thousand, seven hundred ninety-seven".