74309438173 has 2 divisors, whose sum is σ = 74309438174. Its totient is φ = 74309438172.

The previous prime is 74309438153. The next prime is 74309438179. The reversal of 74309438173 is 37183490347.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74211566724 + 97871449 = 272418^2 + 9893^2 .

It is a cyclic number.

It is not a de Polignac number, because 74309438173 - 2⁹ = 74309437661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74309438179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37154719086 + 37154719087.

It is an arithmetic number, because the mean of its divisors is an integer number (37154719087).

Almost surely, 2^74309438173 is an apocalyptic number.

It is an amenable number.

74309438173 is a deficient number, since it is larger than the sum of its proper divisors (1).

74309438173 is an equidigital number, since it uses as much as digits as its factorization.

74309438173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 74309438173 in words is "seventy-four billion, three hundred nine million, four hundred thirty-eight thousand, one hundred seventy-three".