72969277 has 4 divisors (see below), whose sum is σ = 72987580. Its totient is φ = 72950976.

The previous prime is 72969233. The next prime is 72969283. The reversal of 72969277 is 77296927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77296927 = 139 ⋅556093.

It can be written as a sum of positive squares in 2 ways, for example, as 8231161 + 64738116 = 2869^2 + 8046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72969277 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 72969277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72963277) 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, 348 + ... + 12085.

It is an arithmetic number, because the mean of its divisors is an integer number (18246895).

Almost surely, 2^72969277 is an apocalyptic number.

It is an amenable number.

72969277 is a deficient number, since it is larger than the sum of its proper divisors (18303).

72969277 is a wasteful number, since it uses less digits than its factorization.

72969277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18302.

The product of its digits is 666792, while the sum is 49.

The square root of 72969277 is about 8542.2056285248. The cubic root of 72969277 is about 417.8752804347.

The spelling of 72969277 in words is "seventy-two million, nine hundred sixty-nine thousand, two hundred seventy-seven".