15840791 has 2 divisors, whose sum is σ = 15840792. Its totient is φ = 15840790.

The previous prime is 15840751. The next prime is 15840823. The reversal of 15840791 is 19704851.

It is a strong prime.

It is an emirp because it is prime and its reverse (19704851) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15840791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15840731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7920395 + 7920396.

It is an arithmetic number, because the mean of its divisors is an integer number (7920396).

Almost surely, 2^15840791 is an apocalyptic number.

15840791 is a deficient number, since it is larger than the sum of its proper divisors (1).

15840791 is an equidigital number, since it uses as much as digits as its factorization.

15840791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 15840791 is about 3980.0491202999. The cubic root of 15840791 is about 251.1456274650.

The spelling of 15840791 in words is "fifteen million, eight hundred forty thousand, seven hundred ninety-one".