899355091 has 2 divisors, whose sum is σ = 899355092. Its totient is φ = 899355090.

The previous prime is 899355089. The next prime is 899355133. The reversal of 899355091 is 190553998.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 899355091 - 2¹ = 899355089 is a prime.

Together with 899355089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (899355001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449677545 + 449677546.

It is an arithmetic number, because the mean of its divisors is an integer number (449677546).

Almost surely, 2^899355091 is an apocalyptic number.

899355091 is a deficient number, since it is larger than the sum of its proper divisors (1).

899355091 is an equidigital number, since it uses as much as digits as its factorization.

899355091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 437400, while the sum is 49.

The square root of 899355091 is about 29989.2495904783. The cubic root of 899355091 is about 965.2587173550.

The spelling of 899355091 in words is "eight hundred ninety-nine million, three hundred fifty-five thousand, ninety-one".