72295139 has 8 divisors (see below), whose sum is σ = 84309600. Its totient is φ = 61966968.

The previous prime is 72295129. The next prime is 72295159. The reversal of 72295139 is 93159227.

It is not a de Polignac number, because 72295139 - 2¹⁶ = 72229603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72295109) 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 7 ways as a sum of consecutive naturals, for example, 105044 + ... + 105729.

It is an arithmetic number, because the mean of its divisors is an integer number (10538700).

Almost surely, 2^72295139 is an apocalyptic number.

72295139 is a deficient number, since it is larger than the sum of its proper divisors (12014461).

72295139 is an equidigital number, since it uses as much as digits as its factorization.

72295139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210794 (or 210780 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 72295139 is about 8502.6548207016. The cubic root of 72295139 is about 416.5844284273.

The spelling of 72295139 in words is "seventy-two million, two hundred ninety-five thousand, one hundred thirty-nine".