672855523 has 2 divisors, whose sum is σ = 672855524. Its totient is φ = 672855522.

The previous prime is 672855503. The next prime is 672855539. The reversal of 672855523 is 325558276.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672855523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672855523.

It is not a weakly prime, because it can be changed into another prime (672855503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336427761 + 336427762.

It is an arithmetic number, because the mean of its divisors is an integer number (336427762).

Almost surely, 2^672855523 is an apocalyptic number.

672855523 is a deficient number, since it is larger than the sum of its proper divisors (1).

672855523 is an equidigital number, since it uses as much as digits as its factorization.

672855523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 43.

The square root of 672855523 is about 25939.4588031439. The cubic root of 672855523 is about 876.2753746511.

The spelling of 672855523 in words is "six hundred seventy-two million, eight hundred fifty-five thousand, five hundred twenty-three".