634877143 has 4 divisors (see below), whose sum is σ = 635107408. Its totient is φ = 634646880.

The previous prime is 634877137. The next prime is 634877147. The reversal of 634877143 is 341778436.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634877143 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 634877143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634877147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110946 + ... + 116527.

It is an arithmetic number, because the mean of its divisors is an integer number (158776852).

Almost surely, 2^634877143 is an apocalyptic number.

634877143 is a deficient number, since it is larger than the sum of its proper divisors (230265).

634877143 is a wasteful number, since it uses less digits than its factorization.

634877143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230264.

The product of its digits is 338688, while the sum is 43.

The square root of 634877143 is about 25196.7685031236. The cubic root of 634877143 is about 859.4683675667.

The spelling of 634877143 in words is "six hundred thirty-four million, eight hundred seventy-seven thousand, one hundred forty-three".