999941597 has 2 divisors, whose sum is σ = 999941598. Its totient is φ = 999941596.

The previous prime is 999941561. The next prime is 999941599. The reversal of 999941597 is 795149999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996917476 + 3024121 = 31574^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 999941597 - 2²⁴ = 983164381 is a prime.

Together with 999941599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999941599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499970798 + 499970799.

It is an arithmetic number, because the mean of its divisors is an integer number (499970799).

Almost surely, 2^999941597 is an apocalyptic number.

It is an amenable number.

999941597 is a deficient number, since it is larger than the sum of its proper divisors (1).

999941597 is an equidigital number, since it uses as much as digits as its factorization.

999941597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8266860, while the sum is 62.

The square root of 999941597 is about 31621.8531556897. The cubic root of 999941597 is about 999.9805319543.

The spelling of 999941597 in words is "nine hundred ninety-nine million, nine hundred forty-one thousand, five hundred ninety-seven".