72194371 has 4 divisors (see below), whose sum is σ = 72572544. Its totient is φ = 71816200.

The previous prime is 72194329. The next prime is 72194407. The reversal of 72194371 is 17349127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17349127 = 59 ⋅294053.

It is a cyclic number.

It is not a de Polignac number, because 72194371 - 2⁹ = 72193859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72192371) 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, 188800 + ... + 189181.

It is an arithmetic number, because the mean of its divisors is an integer number (18143136).

Almost surely, 2^72194371 is an apocalyptic number.

72194371 is a deficient number, since it is larger than the sum of its proper divisors (378173).

72194371 is a wasteful number, since it uses less digits than its factorization.

72194371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378172.

The product of its digits is 10584, while the sum is 34.

The square root of 72194371 is about 8496.7270757628. The cubic root of 72194371 is about 416.3907874757.

The spelling of 72194371 in words is "seventy-two million, one hundred ninety-four thousand, three hundred seventy-one".