74974169 has 2 divisors, whose sum is σ = 74974170. Its totient is φ = 74974168.

The previous prime is 74974153. The next prime is 74974187. The reversal of 74974169 is 96147947.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 238144 = 8645^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 74974169 - 2⁴ = 74974153 is a prime.

It is a super-2 number, since 2×74974169² = 11242252034481122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74974129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37487084 + 37487085.

It is an arithmetic number, because the mean of its divisors is an integer number (37487085).

Almost surely, 2^74974169 is an apocalyptic number.

It is an amenable number.

74974169 is a deficient number, since it is larger than the sum of its proper divisors (1).

74974169 is an equidigital number, since it uses as much as digits as its factorization.

74974169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 74974169 is about 8658.7625559314. The cubic root of 74974169 is about 421.6679121823.

Subtracting 74974169 from its reverse (96147947), we obtain a triangular number (21173778 = T₆₅₀₇).

The spelling of 74974169 in words is "seventy-four million, nine hundred seventy-four thousand, one hundred sixty-nine".