74772289 has 2 divisors, whose sum is σ = 74772290. Its totient is φ = 74772288.

The previous prime is 74772251. The next prime is 74772317. The reversal of 74772289 is 98227747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48762289 + 26010000 = 6983^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 74772289 - 2⁹ = 74771777 is a prime.

It is not a weakly prime, because it can be changed into another prime (74772209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37386144 + 37386145.

It is an arithmetic number, because the mean of its divisors is an integer number (37386145).

Almost surely, 2^74772289 is an apocalyptic number.

It is an amenable number.

74772289 is a deficient number, since it is larger than the sum of its proper divisors (1).

74772289 is an equidigital number, since it uses as much as digits as its factorization.

74772289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 46.

The square root of 74772289 is about 8647.0971429723. The cubic root of 74772289 is about 421.2891024350.

The spelling of 74772289 in words is "seventy-four million, seven hundred seventy-two thousand, two hundred eighty-nine".