72766289 has 4 divisors (see below), whose sum is σ = 72882240. Its totient is φ = 72650340.

The previous prime is 72766283. The next prime is 72766321. The reversal of 72766289 is 98266727.

72766289 is nontrivially palindromic in base 2.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72766289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72766283) 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, 57029 + ... + 58290.

It is an arithmetic number, because the mean of its divisors is an integer number (18220560).

Almost surely, 2^72766289 is an apocalyptic number.

It is an amenable number.

72766289 is a deficient number, since it is larger than the sum of its proper divisors (115951).

72766289 is a wasteful number, since it uses less digits than its factorization.

72766289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115950.

The product of its digits is 508032, while the sum is 47.

The square root of 72766289 is about 8530.3158792626. The cubic root of 72766289 is about 417.4874348113.

The spelling of 72766289 in words is "seventy-two million, seven hundred sixty-six thousand, two hundred eighty-nine".