74193121 has 2 divisors, whose sum is σ = 74193122. Its totient is φ = 74193120.

The previous prime is 74193113. The next prime is 74193127. The reversal of 74193121 is 12139147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 20830096 = 7305^2 + 4564^2 .

It is a cyclic number.

It is not a de Polignac number, because 74193121 - 2³ = 74193113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74193121.

It is not a weakly prime, because it can be changed into another prime (74193127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37096560 + 37096561.

It is an arithmetic number, because the mean of its divisors is an integer number (37096561).

Almost surely, 2^74193121 is an apocalyptic number.

It is an amenable number.

74193121 is a deficient number, since it is larger than the sum of its proper divisors (1).

74193121 is an equidigital number, since it uses as much as digits as its factorization.

74193121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 74193121 is about 8613.5428831579. The cubic root of 74193121 is about 420.1985474709.

The spelling of 74193121 in words is "seventy-four million, one hundred ninety-three thousand, one hundred twenty-one".