916539391 has 2 divisors, whose sum is σ = 916539392. Its totient is φ = 916539390.

The previous prime is 916539373. The next prime is 916539409. The reversal of 916539391 is 193935619.

It is a balanced prime because it is at equal distance from previous prime (916539373) and next prime (916539409).

It is an emirp because it is prime and its reverse (193935619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 916539391 - 2⁵ = 916539359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (916539311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458269695 + 458269696.

It is an arithmetic number, because the mean of its divisors is an integer number (458269696).

Almost surely, 2^916539391 is an apocalyptic number.

916539391 is a deficient number, since it is larger than the sum of its proper divisors (1).

916539391 is an equidigital number, since it uses as much as digits as its factorization.

916539391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196830, while the sum is 46.

The square root of 916539391 is about 30274.4015795523. The cubic root of 916539391 is about 971.3678194758.

The spelling of 916539391 in words is "nine hundred sixteen million, five hundred thirty-nine thousand, three hundred ninety-one".