72740159 has 2 divisors, whose sum is σ = 72740160. Its totient is φ = 72740158.

The previous prime is 72740153. The next prime is 72740179. The reversal of 72740159 is 95104727.

It is a weak prime.

It is an emirp because it is prime and its reverse (95104727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72740159 - 2²⁰ = 71691583 is a prime.

It is a super-2 number, since 2×72740159² = 10582261462690562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72740153) 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, 36370079 + 36370080.

It is an arithmetic number, because the mean of its divisors is an integer number (36370080).

Almost surely, 2^72740159 is an apocalyptic number.

72740159 is a deficient number, since it is larger than the sum of its proper divisors (1).

72740159 is an equidigital number, since it uses as much as digits as its factorization.

72740159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 72740159 is about 8528.7841454688. The cubic root of 72740159 is about 417.4374562986.

The spelling of 72740159 in words is "seventy-two million, seven hundred forty thousand, one hundred fifty-nine".