72297169 has 4 divisors (see below), whose sum is σ = 82625344. Its totient is φ = 61968996.

The previous prime is 72297151. The next prime is 72297179. The reversal of 72297169 is 96179227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96179227 = 71 ⋅1354637.

It is a cyclic number.

It is not a de Polignac number, because 72297169 - 2⁹ = 72296657 is a prime.

It is a super-2 number, since 2×72297169² = 10453761290829122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72297179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5164077 + ... + 5164090.

It is an arithmetic number, because the mean of its divisors is an integer number (20656336).

Almost surely, 2^72297169 is an apocalyptic number.

It is an amenable number.

72297169 is a deficient number, since it is larger than the sum of its proper divisors (10328175).

72297169 is a wasteful number, since it uses less digits than its factorization.

72297169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328174.

The product of its digits is 95256, while the sum is 43.

The square root of 72297169 is about 8502.7741943439. The cubic root of 72297169 is about 416.5883275299.

The spelling of 72297169 in words is "seventy-two million, two hundred ninety-seven thousand, one hundred sixty-nine".