74157389 has 2 divisors, whose sum is σ = 74157390. Its totient is φ = 74157388.

The previous prime is 74157367. The next prime is 74157401. The reversal of 74157389 is 98375147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41860900 + 32296489 = 6470^2 + 5683^2 .

It is a cyclic number.

It is not a de Polignac number, because 74157389 - 2²⁰ = 73108813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74157989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37078694 + 37078695.

It is an arithmetic number, because the mean of its divisors is an integer number (37078695).

Almost surely, 2^74157389 is an apocalyptic number.

It is an amenable number.

74157389 is a deficient number, since it is larger than the sum of its proper divisors (1).

74157389 is an equidigital number, since it uses as much as digits as its factorization.

74157389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 74157389 is about 8611.4684578183. The cubic root of 74157389 is about 420.1310796459.

The spelling of 74157389 in words is "seventy-four million, one hundred fifty-seven thousand, three hundred eighty-nine".