72287377 has 4 divisors (see below), whose sum is σ = 72654516. Its totient is φ = 71920240.

The previous prime is 72287339. The next prime is 72287393. The reversal of 72287377 is 77378227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77378227 = 107 ⋅723161.

It can be written as a sum of positive squares in 2 ways, for example, as 56415121 + 15872256 = 7511^2 + 3984^2 .

It is a cyclic number.

It is not a de Polignac number, because 72287377 - 2⁷ = 72287249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72287477) 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, 183274 + ... + 183667.

It is an arithmetic number, because the mean of its divisors is an integer number (18163629).

Almost surely, 2^72287377 is an apocalyptic number.

It is an amenable number.

72287377 is a deficient number, since it is larger than the sum of its proper divisors (367139).

72287377 is a wasteful number, since it uses less digits than its factorization.

72287377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367138.

The product of its digits is 230496, while the sum is 43.

The square root of 72287377 is about 8502.1983627765. The cubic root of 72287377 is about 416.5695189691.

The spelling of 72287377 in words is "seventy-two million, two hundred eighty-seven thousand, three hundred seventy-seven".