72253117 has 2 divisors, whose sum is σ = 72253118. Its totient is φ = 72253116.

The previous prime is 72253109. The next prime is 72253133. The reversal of 72253117 is 71135227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58813561 + 13439556 = 7669^2 + 3666^2 .

It is a cyclic number.

It is not a de Polignac number, because 72253117 - 2³ = 72253109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72253817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36126558 + 36126559.

It is an arithmetic number, because the mean of its divisors is an integer number (36126559).

Almost surely, 2^72253117 is an apocalyptic number.

It is an amenable number.

72253117 is a deficient number, since it is larger than the sum of its proper divisors (1).

72253117 is an equidigital number, since it uses as much as digits as its factorization.

72253117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 28.

The square root of 72253117 is about 8500.1833509637. The cubic root of 72253117 is about 416.5036986855.

The spelling of 72253117 in words is "seventy-two million, two hundred fifty-three thousand, one hundred seventeen".