850291913 has 2 divisors, whose sum is σ = 850291914. Its totient is φ = 850291912.

The previous prime is 850291909. The next prime is 850291921. The reversal of 850291913 is 319192058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662135824 + 188156089 = 25732^2 + 13717^2 .

It is a cyclic number.

It is not a de Polignac number, because 850291913 - 2² = 850291909 is a prime.

It is equal to p_43596155 and since 850291913 and 43596155 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (850291943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425145956 + 425145957.

It is an arithmetic number, because the mean of its divisors is an integer number (425145957).

Almost surely, 2^850291913 is an apocalyptic number.

It is an amenable number.

850291913 is a deficient number, since it is larger than the sum of its proper divisors (1).

850291913 is an equidigital number, since it uses as much as digits as its factorization.

850291913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 850291913 is about 29159.7653111269. The cubic root of 850291913 is about 947.3766639562.

The spelling of 850291913 in words is "eight hundred fifty million, two hundred ninety-one thousand, nine hundred thirteen".