72194757 has 4 divisors (see below), whose sum is σ = 96259680. Its totient is φ = 48129836.

The previous prime is 72194713. The next prime is 72194777. The reversal of 72194757 is 75749127.

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.

It is a cyclic number.

It is not a de Polignac number, because 72194757 - 2⁶ = 72194693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72194777) 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, 12032457 + ... + 12032462.

It is an arithmetic number, because the mean of its divisors is an integer number (24064920).

Almost surely, 2^72194757 is an apocalyptic number.

It is an amenable number.

72194757 is a deficient number, since it is larger than the sum of its proper divisors (24064923).

72194757 is a wasteful number, since it uses less digits than its factorization.

72194757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24064922.

The product of its digits is 123480, while the sum is 42.

The square root of 72194757 is about 8496.7497903610. The cubic root of 72194757 is about 416.3915295768.

The spelling of 72194757 in words is "seventy-two million, one hundred ninety-four thousand, seven hundred fifty-seven".