899849791 has 2 divisors, whose sum is σ = 899849792. Its totient is φ = 899849790.

The previous prime is 899849779. The next prime is 899849807. The reversal of 899849791 is 197948998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899849791 - 2⁵ = 899849759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899849701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449924895 + 449924896.

It is an arithmetic number, because the mean of its divisors is an integer number (449924896).

Almost surely, 2^899849791 is an apocalyptic number.

899849791 is a deficient number, since it is larger than the sum of its proper divisors (1).

899849791 is an equidigital number, since it uses as much as digits as its factorization.

899849791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 64.

The square root of 899849791 is about 29997.4964122008. The cubic root of 899849791 is about 965.4356685820.

The spelling of 899849791 in words is "eight hundred ninety-nine million, eight hundred forty-nine thousand, seven hundred ninety-one".