72511069 has 4 divisors (see below), whose sum is σ = 76776444. Its totient is φ = 68245696.

The previous prime is 72511067. The next prime is 72511081. The reversal of 72511069 is 96011527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96011527 = 2699 ⋅35573.

It can be written as a sum of positive squares in 2 ways, for example, as 23328900 + 49182169 = 4830^2 + 7013^2 .

It is a cyclic number.

It is not a de Polignac number, because 72511069 - 2¹ = 72511067 is a prime.

It is a super-2 number, since 2×72511069² = 10515710255045522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72511069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72511063) 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, 2132662 + ... + 2132695.

It is an arithmetic number, because the mean of its divisors is an integer number (19194111).

Almost surely, 2^72511069 is an apocalyptic number.

It is an amenable number.

72511069 is a deficient number, since it is larger than the sum of its proper divisors (4265375).

72511069 is a wasteful number, since it uses less digits than its factorization.

72511069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265374.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 72511069 is about 8515.3431522165. The cubic root of 72511069 is about 416.9987654923.

The spelling of 72511069 in words is "seventy-two million, five hundred eleven thousand, sixty-nine".