634889723 has 8 divisors (see below), whose sum is σ = 713455008. Its totient is φ = 560571264.

The previous prime is 634889713. The next prime is 634889729. The reversal of 634889723 is 327988436.

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

It is a cyclic number.

It is not a de Polignac number, because 634889723 - 2⁴ = 634889707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634889729) 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, 1061390 + ... + 1061987.

It is an arithmetic number, because the mean of its divisors is an integer number (89181876).

Almost surely, 2^634889723 is an apocalyptic number.

634889723 is a deficient number, since it is larger than the sum of its proper divisors (78565285).

634889723 is a wasteful number, since it uses less digits than its factorization.

634889723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123413.

The product of its digits is 1741824, while the sum is 50.

The square root of 634889723 is about 25197.0181370733. The cubic root of 634889723 is about 859.4740442769.

The spelling of 634889723 in words is "six hundred thirty-four million, eight hundred eighty-nine thousand, seven hundred twenty-three".