1994100459 has 60 divisors (see below), whose sum is σ = 3134447064. Its totient is φ = 1123739136.

The previous prime is 1994100457. The next prime is 1994100463. The reversal of 1994100459 is 9540014991.

It is a happy number.

It is not a de Polignac number, because 1994100459 - 2¹ = 1994100457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1994100459.

It is not an unprimeable number, because it can be changed into a prime (1994100457) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 53894589 + ... + 53894625.

Almost surely, 2^1994100459 is an apocalyptic number.

1994100459 is a deficient number, since it is larger than the sum of its proper divisors (1140346605).

1994100459 is an frugal number, since it uses more digits than its factorization.

1994100459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1994100459 is about 44655.3519636784. The cubic root of 1994100459 is about 1258.6810038289.

The spelling of 1994100459 in words is "one billion, nine hundred ninety-four million, one hundred thousand, four hundred fifty-nine".