72677965 has 4 divisors (see below), whose sum is σ = 87213564. Its totient is φ = 58142368.

The previous prime is 72677963. The next prime is 72677971. The reversal of 72677965 is 56977627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56977627 = 7 ⋅8139661.

It can be written as a sum of positive squares in 2 ways, for example, as 11744329 + 60933636 = 3427^2 + 7806^2 .

It is a cyclic number.

It is not a de Polignac number, because 72677965 - 2¹ = 72677963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72677963) 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, 7267792 + ... + 7267801.

It is an arithmetic number, because the mean of its divisors is an integer number (21803391).

Almost surely, 2^72677965 is an apocalyptic number.

It is an amenable number.

72677965 is a deficient number, since it is larger than the sum of its proper divisors (14535599).

72677965 is a wasteful number, since it uses less digits than its factorization.

72677965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14535598.

The product of its digits is 1111320, while the sum is 49.

The square root of 72677965 is about 8525.1372422970. The cubic root of 72677965 is about 417.3184504730.

The spelling of 72677965 in words is "seventy-two million, six hundred seventy-seven thousand, nine hundred sixty-five".