673737861 has 4 divisors (see below), whose sum is σ = 898317152. Its totient is φ = 449158572.

The previous prime is 673737859. The next prime is 673737877. The reversal of 673737861 is 168737376.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 673737861 - 2¹ = 673737859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673737861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673737811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112289641 + ... + 112289646.

It is an arithmetic number, because the mean of its divisors is an integer number (224579288).

Almost surely, 2^673737861 is an apocalyptic number.

It is an amenable number.

673737861 is a deficient number, since it is larger than the sum of its proper divisors (224579291).

673737861 is a wasteful number, since it uses less digits than its factorization.

673737861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224579290.

The product of its digits is 889056, while the sum is 48.

The square root of 673737861 is about 25956.4608720064. The cubic root of 673737861 is about 876.6582371029.

The spelling of 673737861 in words is "six hundred seventy-three million, seven hundred thirty-seven thousand, eight hundred sixty-one".