673736491 has 4 divisors (see below), whose sum is σ = 682965832. Its totient is φ = 664507152.

The previous prime is 673736461. The next prime is 673736501. The reversal of 673736491 is 194637376.

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 673736491 - 2²³ = 665347883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673736431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4614561 + ... + 4614706.

It is an arithmetic number, because the mean of its divisors is an integer number (170741458).

Almost surely, 2^673736491 is an apocalyptic number.

673736491 is a deficient number, since it is larger than the sum of its proper divisors (9229341).

673736491 is an equidigital number, since it uses as much as digits as its factorization.

673736491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9229340.

The product of its digits is 571536, while the sum is 46.

The square root of 673736491 is about 25956.4344816464. The cubic root of 673736491 is about 876.6576428943.

The spelling of 673736491 in words is "six hundred seventy-three million, seven hundred thirty-six thousand, four hundred ninety-one".