15948993 has 4 divisors (see below), whose sum is σ = 21265328. Its totient is φ = 10632660.

The previous prime is 15948991. The next prime is 15948997. The reversal of 15948993 is 39984951.

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.

It is not a de Polignac number, because 15948993 - 2¹ = 15948991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15948991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2658163 + ... + 2658168.

It is an arithmetic number, because the mean of its divisors is an integer number (5316332).

Almost surely, 2^15948993 is an apocalyptic number.

It is an amenable number.

15948993 is a deficient number, since it is larger than the sum of its proper divisors (5316335).

15948993 is an equidigital number, since it uses as much as digits as its factorization.

15948993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316334.

The product of its digits is 349920, while the sum is 48.

The square root of 15948993 is about 3993.6190354114. The cubic root of 15948993 is about 251.7161549585.

The spelling of 15948993 in words is "fifteen million, nine hundred forty-eight thousand, nine hundred ninety-three".