1999478733 has 8 divisors (see below), whose sum is σ = 3046824768. Its totient is φ = 1142559264.

The previous prime is 1999478707. The next prime is 1999478753. The reversal of 1999478733 is 3378749991.

It is a happy number.

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

It is not a de Polignac number, because 1999478733 - 2¹³ = 1999470541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999478753) 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, 47606616 + ... + 47606657.

It is an arithmetic number, because the mean of its divisors is an integer number (380853096).

Almost surely, 2^1999478733 is an apocalyptic number.

It is an amenable number.

1999478733 is a deficient number, since it is larger than the sum of its proper divisors (1047346035).

1999478733 is an equidigital number, since it uses as much as digits as its factorization.

1999478733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95213283.

The product of its digits is 10287648, while the sum is 60.

The square root of 1999478733 is about 44715.5312279749. The cubic root of 1999478733 is about 1259.8115811729.

The spelling of 1999478733 in words is "one billion, nine hundred ninety-nine million, four hundred seventy-eight thousand, seven hundred thirty-three".