74479393 has 2 divisors, whose sum is σ = 74479394. Its totient is φ = 74479392.

The previous prime is 74479367. The next prime is 74479399. The reversal of 74479393 is 39397447.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42928704 + 31550689 = 6552^2 + 5617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74479393 is a prime.

It is not a weakly prime, because it can be changed into another prime (74479399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37239696 + 37239697.

It is an arithmetic number, because the mean of its divisors is an integer number (37239697).

Almost surely, 2^74479393 is an apocalyptic number.

It is an amenable number.

74479393 is a deficient number, since it is larger than the sum of its proper divisors (1).

74479393 is an equidigital number, since it uses as much as digits as its factorization.

74479393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 46.

The square root of 74479393 is about 8630.1444367983. The cubic root of 74479393 is about 420.7382951570.

The spelling of 74479393 in words is "seventy-four million, four hundred seventy-nine thousand, three hundred ninety-three".