74720587 has 2 divisors, whose sum is σ = 74720588. Its totient is φ = 74720586.

The previous prime is 74720579. The next prime is 74720599. The reversal of 74720587 is 78502747.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74720587 - 2³ = 74720579 is a prime.

It is a super-2 number, since 2×74720587² = 11166332243249138, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74720557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37360293 + 37360294.

It is an arithmetic number, because the mean of its divisors is an integer number (37360294).

Almost surely, 2^74720587 is an apocalyptic number.

74720587 is a deficient number, since it is larger than the sum of its proper divisors (1).

74720587 is an equidigital number, since it uses as much as digits as its factorization.

74720587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 74720587 is about 8644.1070678237. The cubic root of 74720587 is about 421.1919786130.

The spelling of 74720587 in words is "seventy-four million, seven hundred twenty thousand, five hundred eighty-seven".