72179741 has 4 divisors (see below), whose sum is σ = 72479484. Its totient is φ = 71880000.

The previous prime is 72179717. The next prime is 72179743. The reversal of 72179741 is 14797127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30525625 + 41654116 = 5525^2 + 6454^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72179741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72179695 and 72179704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72179743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149510 + ... + 149991.

It is an arithmetic number, because the mean of its divisors is an integer number (18119871).

Almost surely, 2^72179741 is an apocalyptic number.

It is an amenable number.

72179741 is a deficient number, since it is larger than the sum of its proper divisors (299743).

72179741 is a wasteful number, since it uses less digits than its factorization.

72179741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299742.

The product of its digits is 24696, while the sum is 38.

The square root of 72179741 is about 8495.8661124102. The cubic root of 72179741 is about 416.3626587418.

The spelling of 72179741 in words is "seventy-two million, one hundred seventy-nine thousand, seven hundred forty-one".