72506269 has 4 divisors (see below), whose sum is σ = 79097760. Its totient is φ = 65914780.

The previous prime is 72506267. The next prime is 72506333. The reversal of 72506269 is 96260527.

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: 96260527 = 11 ⋅8750957.

It is a cyclic number.

It is not a de Polignac number, because 72506269 - 2¹ = 72506267 is a prime.

It is a super-2 number, since 2×72506269² = 10514318088600722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72506267) 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, 3295729 + ... + 3295750.

It is an arithmetic number, because the mean of its divisors is an integer number (19774440).

Almost surely, 2^72506269 is an apocalyptic number.

It is an amenable number.

72506269 is a deficient number, since it is larger than the sum of its proper divisors (6591491).

72506269 is a wasteful number, since it uses less digits than its factorization.

72506269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6591490.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 72506269 is about 8515.0613033612. The cubic root of 72506269 is about 416.9895639627.

The spelling of 72506269 in words is "seventy-two million, five hundred six thousand, two hundred sixty-nine".