72344897 has 4 divisors (see below), whose sum is σ = 72452436. Its totient is φ = 72237360.

The previous prime is 72344887. The next prime is 72344927. The reversal of 72344897 is 79844327.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61481281 + 10863616 = 7841^2 + 3296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72344897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72344827) 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, 52754 + ... + 54107.

It is an arithmetic number, because the mean of its divisors is an integer number (18113109).

Almost surely, 2^72344897 is an apocalyptic number.

It is an amenable number.

72344897 is a deficient number, since it is larger than the sum of its proper divisors (107539).

72344897 is a wasteful number, since it uses less digits than its factorization.

72344897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107538.

The product of its digits is 338688, while the sum is 44.

The square root of 72344897 is about 8505.5803446914. The cubic root of 72344897 is about 416.6799795924.

The spelling of 72344897 in words is "seventy-two million, three hundred forty-four thousand, eight hundred ninety-seven".