673561351 has 4 divisors (see below), whose sum is σ = 681676632. Its totient is φ = 665446072.

The previous prime is 673561349. The next prime is 673561363. The reversal of 673561351 is 153165376.

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 673561351 - 2¹ = 673561349 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 673561351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673568351) 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, 4057516 + ... + 4057681.

It is an arithmetic number, because the mean of its divisors is an integer number (170419158).

Almost surely, 2^673561351 is an apocalyptic number.

673561351 is a deficient number, since it is larger than the sum of its proper divisors (8115281).

673561351 is an equidigital number, since it uses as much as digits as its factorization.

673561351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8115280.

The product of its digits is 56700, while the sum is 37.

The square root of 673561351 is about 25953.0605324305. The cubic root of 673561351 is about 876.5816729724.

It can be divided in two parts, 6735 and 61351, that added together give a palindrome (68086).

The spelling of 673561351 in words is "six hundred seventy-three million, five hundred sixty-one thousand, three hundred fifty-one".