16247390993 has 4 divisors (see below), whose sum is σ = 16265709120. Its totient is φ = 16229072868.

The previous prime is 16247390981. The next prime is 16247391007. The reversal of 16247390993 is 39909374261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39909374261 = 73 ⋅546703757.

It is a cyclic number.

It is not a de Polignac number, because 16247390993 - 2³² = 11952423697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16247390933) 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, 9157733 + ... + 9159506.

It is an arithmetic number, because the mean of its divisors is an integer number (4066427280).

Almost surely, 2^16247390993 is an apocalyptic number.

It is an amenable number.

16247390993 is a deficient number, since it is larger than the sum of its proper divisors (18318127).

16247390993 is an equidigital number, since it uses as much as digits as its factorization.

16247390993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18318126.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 16247390993 in words is "sixteen billion, two hundred forty-seven million, three hundred ninety thousand, nine hundred ninety-three".