74297491 has 2 divisors, whose sum is σ = 74297492. Its totient is φ = 74297490.

The previous prime is 74297479. The next prime is 74297549. The reversal of 74297491 is 19479247.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74297491 - 2⁹ = 74296979 is a prime.

It is not a weakly prime, because it can be changed into another prime (74297401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37148745 + 37148746.

It is an arithmetic number, because the mean of its divisors is an integer number (37148746).

Almost surely, 2^74297491 is an apocalyptic number.

74297491 is a deficient number, since it is larger than the sum of its proper divisors (1).

74297491 is an equidigital number, since it uses as much as digits as its factorization.

74297491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 74297491 is about 8619.5992366235. The cubic root of 74297491 is about 420.3954910385.

The spelling of 74297491 in words is "seventy-four million, two hundred ninety-seven thousand, four hundred ninety-one".