74976509 has 2 divisors, whose sum is σ = 74976510. Its totient is φ = 74976508.

The previous prime is 74976479. The next prime is 74976533. The reversal of 74976509 is 90567947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40284409 + 34692100 = 6347^2 + 5890^2 .

It is a cyclic number.

It is not a de Polignac number, because 74976509 - 2²⁰ = 73927933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74976599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37488254 + 37488255.

It is an arithmetic number, because the mean of its divisors is an integer number (37488255).

Almost surely, 2^74976509 is an apocalyptic number.

It is an amenable number.

74976509 is a deficient number, since it is larger than the sum of its proper divisors (1).

74976509 is an equidigital number, since it uses as much as digits as its factorization.

74976509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 74976509 is about 8658.8976781112. The cubic root of 74976509 is about 421.6722989938.

The spelling of 74976509 in words is "seventy-four million, nine hundred seventy-six thousand, five hundred nine".