72577643 has 4 divisors (see below), whose sum is σ = 72602808. Its totient is φ = 72552480.

The previous prime is 72577639. The next prime is 72577649. The reversal of 72577643 is 34677527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72577643 - 2² = 72577639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72577643.

It is not an unprimeable number, because it can be changed into a prime (72577649) 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, 7598 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (18150702).

Almost surely, 2^72577643 is an apocalyptic number.

72577643 is a deficient number, since it is larger than the sum of its proper divisors (25165).

72577643 is a wasteful number, since it uses less digits than its factorization.

72577643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25164.

The product of its digits is 246960, while the sum is 41.

The square root of 72577643 is about 8519.2513168705. The cubic root of 72577643 is about 417.1263450212.

The spelling of 72577643 in words is "seventy-two million, five hundred seventy-seven thousand, six hundred forty-three".