673737013 has 4 divisors (see below), whose sum is σ = 713368620. Its totient is φ = 634105408.

The previous prime is 673737011. The next prime is 673737023. The reversal of 673737013 is 310737376.

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

It can be written as a sum of positive squares in 2 ways, for example, as 419717169 + 254019844 = 20487^2 + 15938^2 .

It is a cyclic number.

It is not a de Polignac number, because 673737013 - 2¹ = 673737011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673737011) 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, 19815778 + ... + 19815811.

It is an arithmetic number, because the mean of its divisors is an integer number (178342155).

Almost surely, 2^673737013 is an apocalyptic number.

It is an amenable number.

673737013 is a deficient number, since it is larger than the sum of its proper divisors (39631607).

673737013 is a wasteful number, since it uses less digits than its factorization.

673737013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39631606.

The product of its (nonzero) digits is 55566, while the sum is 37.

The square root of 673737013 is about 25956.4445369546. Note that the first 3 decimals coincide. The cubic root of 673737013 is about 876.6578693009.

The spelling of 673737013 in words is "six hundred seventy-three million, seven hundred thirty-seven thousand, thirteen".