72194637 has 8 divisors (see below), whose sum is σ = 96321280. Its totient is φ = 48098880.

The previous prime is 72194627. The next prime is 72194663. The reversal of 72194637 is 73649127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72194637 - 2⁴ = 72194621 is a prime.

It is a super-2 number, since 2×72194637² = 10424131223123538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72194595 and 72194604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72194627) 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 7 ways as a sum of consecutive naturals, for example, 1564 + ... + 12117.

It is an arithmetic number, because the mean of its divisors is an integer number (12040160).

Almost surely, 2^72194637 is an apocalyptic number.

It is an amenable number.

72194637 is a deficient number, since it is larger than the sum of its proper divisors (24126643).

72194637 is a wasteful number, since it uses less digits than its factorization.

72194637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15443.

The product of its digits is 63504, while the sum is 39.

The square root of 72194637 is about 8496.7427288344. The cubic root of 72194637 is about 416.3912988721.

The spelling of 72194637 in words is "seventy-two million, one hundred ninety-four thousand, six hundred thirty-seven".