1023749994 has 16 divisors (see below), whose sum is σ = 2076338880. Its totient is φ = 336443520.

The previous prime is 1023749981. The next prime is 1023750023. The reversal of 1023749994 is 4999473201.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201159 + ... + 1202010.

It is an arithmetic number, because the mean of its divisors is an integer number (129771180).

Almost surely, 2^1023749994 is an apocalyptic number.

1023749994 is an abundant number, since it is smaller than the sum of its proper divisors (1052588886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023749994 is a wasteful number, since it uses less digits than its factorization.

1023749994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403245.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 1023749994 is about 31996.0934177909. The cubic root of 1023749994 is about 1007.8548051607.

The spelling of 1023749994 in words is "one billion, twenty-three million, seven hundred forty-nine thousand, nine hundred ninety-four".