72179029 has 4 divisors (see below), whose sum is σ = 77731276. Its totient is φ = 66626784.

The previous prime is 72179021. The next prime is 72179047. The reversal of 72179029 is 92097127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92097127 = 29 ⋅3175763.

It can be written as a sum of positive squares in 2 ways, for example, as 4906225 + 67272804 = 2215^2 + 8202^2 .

It is a cyclic number.

It is not a de Polignac number, because 72179029 - 2³ = 72179021 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 (72179021) 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, 2776104 + ... + 2776129.

It is an arithmetic number, because the mean of its divisors is an integer number (19432819).

Almost surely, 2^72179029 is an apocalyptic number.

It is an amenable number.

72179029 is a deficient number, since it is larger than the sum of its proper divisors (5552247).

72179029 is a wasteful number, since it uses less digits than its factorization.

72179029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552246.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 72179029 is about 8495.8242095750. The cubic root of 72179029 is about 416.3612897002.

It can be divided in two parts, 72 and 179029, that added together give a triangular number (179101 = T₅₉₈).

The spelling of 72179029 in words is "seventy-two million, one hundred seventy-nine thousand, twenty-nine".