634877 has 4 divisors (see below), whose sum is σ = 636480. Its totient is φ = 633276.

The previous prime is 634871. The next prime is 634891. The reversal of 634877 is 778436.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 634877 - 2⁴ = 634861 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634871) 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, 278 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (159120).

2⁶³⁴⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

634877 is a deficient number, since it is larger than the sum of its proper divisors (1603).

634877 is an equidigital number, since it uses as much as digits as its factorization.

634877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602.

The product of its digits is 28224, while the sum is 35.

The square root of 634877 is about 796.7916917238. The cubic root of 634877 is about 85.9468303038.

The spelling of 634877 in words is "six hundred thirty-four thousand, eight hundred seventy-seven".