916515139 has 2 divisors, whose sum is σ = 916515140. Its totient is φ = 916515138.

The previous prime is 916515097. The next prime is 916515151. The reversal of 916515139 is 931515619.

It is a strong prime.

It is an emirp because it is prime and its reverse (931515619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 916515139 - 2¹³ = 916506947 is a prime.

It is not a weakly prime, because it can be changed into another prime (916510139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458257569 + 458257570.

It is an arithmetic number, because the mean of its divisors is an integer number (458257570).

Almost surely, 2^916515139 is an apocalyptic number.

916515139 is a deficient number, since it is larger than the sum of its proper divisors (1).

916515139 is an equidigital number, since it uses as much as digits as its factorization.

916515139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36450, while the sum is 40.

The square root of 916515139 is about 30274.0010404968. The cubic root of 916515139 is about 971.3592518061.

The spelling of 916515139 in words is "nine hundred sixteen million, five hundred fifteen thousand, one hundred thirty-nine".