72077687 has 8 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 65429560.

The previous prime is 72077683. The next prime is 72077689. The reversal of 72077687 is 78677027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72077687 - 2² = 72077683 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 (72077683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3764 + ... + 12582.

It is an arithmetic number, because the mean of its divisors is an integer number (9843120).

Almost surely, 2^72077687 is an apocalyptic number.

72077687 is a deficient number, since it is larger than the sum of its proper divisors (6667273).

72077687 is a wasteful number, since it uses less digits than its factorization.

72077687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9573.

The product of its (nonzero) digits is 230496, while the sum is 44.

The square root of 72077687 is about 8489.8578904479. The cubic root of 72077687 is about 416.1663362650.

The spelling of 72077687 in words is "seventy-two million, seventy-seven thousand, six hundred eighty-seven".