674951781 has 8 divisors (see below), whose sum is σ = 1028497984. Its totient is φ = 385686720.

The previous prime is 674951777. The next prime is 674951857. The reversal of 674951781 is 187159476.

674951781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 674951781 - 2² = 674951777 is a prime.

It is a super-2 number, since 2×674951781² = 911119813350143922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 674951781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674951741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16070260 + ... + 16070301.

It is an arithmetic number, because the mean of its divisors is an integer number (128562248).

Almost surely, 2^674951781 is an apocalyptic number.

It is an amenable number.

674951781 is a deficient number, since it is larger than the sum of its proper divisors (353546203).

674951781 is a wasteful number, since it uses less digits than its factorization.

674951781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32140571.

The product of its digits is 423360, while the sum is 48.

The square root of 674951781 is about 25979.8341218723. The cubic root of 674951781 is about 877.1844330833.

The spelling of 674951781 in words is "six hundred seventy-four million, nine hundred fifty-one thousand, seven hundred eighty-one".