74442397 has 2 divisors, whose sum is σ = 74442398. Its totient is φ = 74442396.

The previous prime is 74442373. The next prime is 74442463. The reversal of 74442397 is 79324447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74287161 + 155236 = 8619^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 74442397 - 2¹¹ = 74440349 is a prime.

It is a super-2 number, since 2×74442397² = 11083340942211218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74442307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37221198 + 37221199.

It is an arithmetic number, because the mean of its divisors is an integer number (37221199).

Almost surely, 2^74442397 is an apocalyptic number.

It is an amenable number.

74442397 is a deficient number, since it is larger than the sum of its proper divisors (1).

74442397 is an equidigital number, since it uses as much as digits as its factorization.

74442397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The square root of 74442397 is about 8628.0007533611. Note that the first 3 decimals coincide. The cubic root of 74442397 is about 420.6686194550.

The spelling of 74442397 in words is "seventy-four million, four hundred forty-two thousand, three hundred ninety-seven".