899700019 has 2 divisors, whose sum is σ = 899700020. Its totient is φ = 899700018.

The previous prime is 899699971. The next prime is 899700049. The reversal of 899700019 is 910007998.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899700019 is a prime.

It is a super-2 number, since 2×899700019² = 1618920248377200722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (899700049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449850009 + 449850010.

It is an arithmetic number, because the mean of its divisors is an integer number (449850010).

Almost surely, 2^899700019 is an apocalyptic number.

899700019 is a deficient number, since it is larger than the sum of its proper divisors (1).

899700019 is an equidigital number, since it uses as much as digits as its factorization.

899700019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 899700019 is about 29994.9998999833. Note that the first 3 decimals coincide. The cubic root of 899700019 is about 965.3821028812.

The spelling of 899700019 in words is "eight hundred ninety-nine million, seven hundred thousand, nineteen".