672563839 has 2 divisors, whose sum is σ = 672563840. Its totient is φ = 672563838.

The previous prime is 672563821. The next prime is 672563873. The reversal of 672563839 is 938365276.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 672563839 - 2¹⁵ = 672531071 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 672563792 and 672563801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672569839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336281919 + 336281920.

It is an arithmetic number, because the mean of its divisors is an integer number (336281920).

Almost surely, 2^672563839 is an apocalyptic number.

672563839 is a deficient number, since it is larger than the sum of its proper divisors (1).

672563839 is an equidigital number, since it uses as much as digits as its factorization.

672563839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 49.

The square root of 672563839 is about 25933.8357941898. The cubic root of 672563839 is about 876.1487340672.

The spelling of 672563839 in words is "six hundred seventy-two million, five hundred sixty-three thousand, eight hundred thirty-nine".