72099079 has 4 divisors (see below), whose sum is σ = 77645176. Its totient is φ = 66552984.

The previous prime is 72099067. The next prime is 72099101. The reversal of 72099079 is 97099027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97099027 = 103 ⋅942709.

It is a cyclic number.

It is not a de Polignac number, because 72099079 - 2¹⁷ = 71968007 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 (72099019) 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, 2773029 + ... + 2773054.

It is an arithmetic number, because the mean of its divisors is an integer number (19411294).

Almost surely, 2^72099079 is an apocalyptic number.

72099079 is a deficient number, since it is larger than the sum of its proper divisors (5546097).

72099079 is a wasteful number, since it uses less digits than its factorization.

72099079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546096.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 72099079 is about 8491.1176531715. The cubic root of 72099079 is about 416.2075036500.

It can be divided in two parts, 720 and 99079, that added together give a palindrome (99799).

The spelling of 72099079 in words is "seventy-two million, ninety-nine thousand, seventy-nine".