72194663 has 2 divisors, whose sum is σ = 72194664. Its totient is φ = 72194662.

The previous prime is 72194627. The next prime is 72194669. The reversal of 72194663 is 36649127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72194663 - 2⁸ = 72194407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72194669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36097331 + 36097332.

It is an arithmetic number, because the mean of its divisors is an integer number (36097332).

Almost surely, 2^72194663 is an apocalyptic number.

72194663 is a deficient number, since it is larger than the sum of its proper divisors (1).

72194663 is an equidigital number, since it uses as much as digits as its factorization.

72194663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 72194663 is about 8496.7442588323. The cubic root of 72194663 is about 416.3913488581.

The spelling of 72194663 in words is "seventy-two million, one hundred ninety-four thousand, six hundred sixty-three".