1993247999 has 4 divisors (see below), whose sum is σ = 1997516664. Its totient is φ = 1988979336.

The previous prime is 1993247989. The next prime is 1993248007. The reversal of 1993247999 is 9997423991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9997423991 = 2713 ⋅3685007.

It is a cyclic number.

It is not a de Polignac number, because 1993247999 - 2⁴ = 1993247983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993247939) 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, 2133632 + ... + 2134565.

It is an arithmetic number, because the mean of its divisors is an integer number (499379166).

Almost surely, 2^1993247999 is an apocalyptic number.

1993247999 is a deficient number, since it is larger than the sum of its proper divisors (4268665).

1993247999 is an equidigital number, since it uses as much as digits as its factorization.

1993247999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4268664.

The product of its digits is 9920232, while the sum is 62.

The square root of 1993247999 is about 44645.8060628319. The cubic root of 1993247999 is about 1258.5016199977.

The spelling of 1993247999 in words is "one billion, nine hundred ninety-three million, two hundred forty-seven thousand, nine hundred ninety-nine".