899889013 has 2 divisors, whose sum is σ = 899889014. Its totient is φ = 899889012.

The previous prime is 899888981. The next prime is 899889017. The reversal of 899889013 is 310988998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 668636164 + 231252849 = 25858^2 + 15207^2 .

It is a cyclic number.

It is not a de Polignac number, because 899889013 - 2⁵ = 899888981 is a prime.

It is a super-2 number, since 2×899889013² = 1619600471436228338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899889017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449944506 + 449944507.

It is an arithmetic number, because the mean of its divisors is an integer number (449944507).

Almost surely, 2^899889013 is an apocalyptic number.

It is an amenable number.

899889013 is a deficient number, since it is larger than the sum of its proper divisors (1).

899889013 is an equidigital number, since it uses as much as digits as its factorization.

899889013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 899889013 is about 29998.1501596348. The cubic root of 899889013 is about 965.4496952814.

The spelling of 899889013 in words is "eight hundred ninety-nine million, eight hundred eighty-nine thousand, thirteen".