1634140123 has 16 divisors (see below), whose sum is σ = 2038256640. Its totient is φ = 1272801600.

The previous prime is 1634140021. The next prime is 1634140129. The reversal of 1634140123 is 3210414361.

It is not a de Polignac number, because 1634140123 - 2²⁵ = 1600585691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1634140129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326383 + ... + 331351.

It is an arithmetic number, because the mean of its divisors is an integer number (127391040).

Almost surely, 2^1634140123 is an apocalyptic number.

1634140123 is a deficient number, since it is larger than the sum of its proper divisors (404116517).

1634140123 is a wasteful number, since it uses less digits than its factorization.

1634140123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9258.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1634140123 is about 40424.4990445151. The cubic root of 1634140123 is about 1177.8674791809.

Adding to 1634140123 its reverse (3210414361), we get a palindrome (4844554484).

The spelling of 1634140123 in words is "one billion, six hundred thirty-four million, one hundred forty thousand, one hundred twenty-three".