72180413 has 4 divisors (see below), whose sum is σ = 72199200. Its totient is φ = 72161628.

The previous prime is 72180403. The next prime is 72180439. The reversal of 72180413 is 31408127.

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 72180413 - 2⁴ = 72180397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72180403) 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, 1313 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (18049800).

Almost surely, 2^72180413 is an apocalyptic number.

It is an amenable number.

72180413 is a deficient number, since it is larger than the sum of its proper divisors (18787).

72180413 is a wasteful number, since it uses less digits than its factorization.

72180413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18786.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 72180413 is about 8495.9056609640. The cubic root of 72180413 is about 416.3639508626.

The spelling of 72180413 in words is "seventy-two million, one hundred eighty thousand, four hundred thirteen".