72269449 has 4 divisors (see below), whose sum is σ = 82593664. Its totient is φ = 61945236.

The previous prime is 72269447. The next prime is 72269459. The reversal of 72269449 is 94496227.

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: 94496227 = 7 ⋅13499461.

It is a cyclic number.

It is not a de Polignac number, because 72269449 - 2¹ = 72269447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72269441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5162097 + ... + 5162110.

It is an arithmetic number, because the mean of its divisors is an integer number (20648416).

Almost surely, 2^72269449 is an apocalyptic number.

It is an amenable number.

72269449 is a deficient number, since it is larger than the sum of its proper divisors (10324215).

72269449 is a wasteful number, since it uses less digits than its factorization.

72269449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10324214.

The product of its digits is 217728, while the sum is 43.

The square root of 72269449 is about 8501.1439818415. The cubic root of 72269449 is about 416.5350783050.

The spelling of 72269449 in words is "seventy-two million, two hundred sixty-nine thousand, four hundred forty-nine".