655672319 has 4 divisors (see below), whose sum is σ = 659295000. Its totient is φ = 652049640.

The previous prime is 655672279. The next prime is 655672321. The reversal of 655672319 is 913276556.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655672319 is a prime.

It is a super-2 number, since 2×655672319² = 859812379805675522, which contains 22 as substring.

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 655672319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655671319) 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, 1811069 + ... + 1811430.

It is an arithmetic number, because the mean of its divisors is an integer number (164823750).

Almost surely, 2^655672319 is an apocalyptic number.

655672319 is a deficient number, since it is larger than the sum of its proper divisors (3622681).

655672319 is a wasteful number, since it uses less digits than its factorization.

655672319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622680.

The product of its digits is 340200, while the sum is 44.

The square root of 655672319 is about 25606.0992538887. The cubic root of 655672319 is about 868.7515978509.

The spelling of 655672319 in words is "six hundred fifty-five million, six hundred seventy-two thousand, three hundred nineteen".