74390497 has 2 divisors, whose sum is σ = 74390498. Its totient is φ = 74390496.

The previous prime is 74390479. The next prime is 74390501. The reversal of 74390497 is 79409347.

It is a happy number.

Together with previous prime (74390479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53450721 + 20939776 = 7311^2 + 4576^2 .

It is a cyclic number.

It is not a de Polignac number, because 74390497 - 2¹¹ = 74388449 is a prime.

It is not a weakly prime, because it can be changed into another prime (74390467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37195248 + 37195249.

It is an arithmetic number, because the mean of its divisors is an integer number (37195249).

Almost surely, 2^74390497 is an apocalyptic number.

It is an amenable number.

74390497 is a deficient number, since it is larger than the sum of its proper divisors (1).

74390497 is an equidigital number, since it uses as much as digits as its factorization.

74390497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 74390497 is about 8624.9925797070. The cubic root of 74390497 is about 420.5708356741.

The spelling of 74390497 in words is "seventy-four million, three hundred ninety thousand, four hundred ninety-seven".