673431563 has 4 divisors (see below), whose sum is σ = 769636080. Its totient is φ = 577227048.

The previous prime is 673431553. The next prime is 673431589. The reversal of 673431563 is 365134376.

It is a happy number.

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 673431563 - 2¹² = 673427467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673431553) 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, 48102248 + ... + 48102261.

It is an arithmetic number, because the mean of its divisors is an integer number (192409020).

Almost surely, 2^673431563 is an apocalyptic number.

673431563 is a deficient number, since it is larger than the sum of its proper divisors (96204517).

673431563 is an equidigital number, since it uses as much as digits as its factorization.

673431563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96204516.

The product of its digits is 136080, while the sum is 38.

The square root of 673431563 is about 25950.5599746903. The cubic root of 673431563 is about 876.5253667477.

The spelling of 673431563 in words is "six hundred seventy-three million, four hundred thirty-one thousand, five hundred sixty-three".