634150823 has 4 divisors (see below), whose sum is σ = 634787880. Its totient is φ = 633513768.

The previous prime is 634150817. The next prime is 634150831. The reversal of 634150823 is 328051436.

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 634150823 - 2¹⁰ = 634149799 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 634150823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634150843) 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, 317033 + ... + 319026.

It is an arithmetic number, because the mean of its divisors is an integer number (158696970).

Almost surely, 2^634150823 is an apocalyptic number.

634150823 is a deficient number, since it is larger than the sum of its proper divisors (637057).

634150823 is an equidigital number, since it uses as much as digits as its factorization.

634150823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637056.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 634150823 is about 25182.3514191983. The cubic root of 634150823 is about 859.1404892904.

The spelling of 634150823 in words is "six hundred thirty-four million, one hundred fifty thousand, eight hundred twenty-three".