15397843 has 2 divisors, whose sum is σ = 15397844. Its totient is φ = 15397842.

The previous prime is 15397819. The next prime is 15397849. The reversal of 15397843 is 34879351.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15397843 - 2⁹ = 15397331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15397796 and 15397805.

It is not a weakly prime, because it can be changed into another prime (15397849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7698921 + 7698922.

It is an arithmetic number, because the mean of its divisors is an integer number (7698922).

Almost surely, 2^15397843 is an apocalyptic number.

15397843 is a deficient number, since it is larger than the sum of its proper divisors (1).

15397843 is an equidigital number, since it uses as much as digits as its factorization.

15397843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 15397843 is about 3924.0085371976. The cubic root of 15397843 is about 248.7825771497.

The spelling of 15397843 in words is "fifteen million, three hundred ninety-seven thousand, eight hundred forty-three".