72149699 has 4 divisors (see below), whose sum is σ = 72437400. Its totient is φ = 71862000.

The previous prime is 72149663. The next prime is 72149711. The reversal of 72149699 is 99694127.

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

It is a cyclic number.

It is not a de Polignac number, because 72149699 - 2¹⁶ = 72084163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72149629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143474 + ... + 143975.

It is an arithmetic number, because the mean of its divisors is an integer number (18109350).

Almost surely, 2^72149699 is an apocalyptic number.

72149699 is a deficient number, since it is larger than the sum of its proper divisors (287701).

72149699 is a wasteful number, since it uses less digits than its factorization.

72149699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287700.

The product of its digits is 244944, while the sum is 47.

The square root of 72149699 is about 8494.0978920660. The cubic root of 72149699 is about 416.3048858238.

The spelling of 72149699 in words is "seventy-two million, one hundred forty-nine thousand, six hundred ninety-nine".