72140569 has 4 divisors (see below), whose sum is σ = 72160000. Its totient is φ = 72121140.

The previous prime is 72140557. The next prime is 72140591. The reversal of 72140569 is 96504127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96504127 = 383 ⋅251969.

It is a cyclic number.

It is not a de Polignac number, because 72140569 - 2¹⁵ = 72107801 is a prime.

It is a super-2 number, since 2×72140569² = 10408523391287522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72140599) 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, 2217 + ... + 12214.

It is an arithmetic number, because the mean of its divisors is an integer number (18040000).

Almost surely, 2^72140569 is an apocalyptic number.

It is an amenable number.

72140569 is a deficient number, since it is larger than the sum of its proper divisors (19431).

72140569 is a wasteful number, since it uses less digits than its factorization.

72140569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19430.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 72140569 is about 8493.5604430651. The cubic root of 72140569 is about 416.2873250023.

The spelling of 72140569 in words is "seventy-two million, one hundred forty thousand, five hundred sixty-nine".