15347993 has 2 divisors, whose sum is σ = 15347994. Its totient is φ = 15347992.

The previous prime is 15347977. The next prime is 15348001. The reversal of 15347993 is 39974351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10316944 + 5031049 = 3212^2 + 2243^2 .

It is a cyclic number.

It is not a de Polignac number, because 15347993 - 2⁴ = 15347977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15347993.

It is not a weakly prime, because it can be changed into another prime (15347903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7673996 + 7673997.

It is an arithmetic number, because the mean of its divisors is an integer number (7673997).

Almost surely, 2^15347993 is an apocalyptic number.

It is an amenable number.

15347993 is a deficient number, since it is larger than the sum of its proper divisors (1).

15347993 is an equidigital number, since it uses as much as digits as its factorization.

15347993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 41.

The square root of 15347993 is about 3917.6514648447. The cubic root of 15347993 is about 248.5138118194.

The spelling of 15347993 in words is "fifteen million, three hundred forty-seven thousand, nine hundred ninety-three".