74638723 has 2 divisors, whose sum is σ = 74638724. Its totient is φ = 74638722.

The previous prime is 74638709. The next prime is 74638727. The reversal of 74638723 is 32783647.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74638723 is a prime.

It is not a weakly prime, because it can be changed into another prime (74638727) 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, 37319361 + 37319362.

It is an arithmetic number, because the mean of its divisors is an integer number (37319362).

Almost surely, 2^74638723 is an apocalyptic number.

74638723 is a deficient number, since it is larger than the sum of its proper divisors (1).

74638723 is an equidigital number, since it uses as much as digits as its factorization.

74638723 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 74638723 is about 8639.3705210507. The cubic root of 74638723 is about 421.0381028586.

The spelling of 74638723 in words is "seventy-four million, six hundred thirty-eight thousand, seven hundred twenty-three".