898981999 has 2 divisors, whose sum is σ = 898982000. Its totient is φ = 898981998.

The previous prime is 898981987. The next prime is 898982003. The reversal of 898981999 is 999189898.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 898981999 - 2⁹ = 898981487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898981799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449490999 + 449491000.

It is an arithmetic number, because the mean of its divisors is an integer number (449491000).

Almost surely, 2^898981999 is an apocalyptic number.

898981999 is a deficient number, since it is larger than the sum of its proper divisors (1).

898981999 is an equidigital number, since it uses as much as digits as its factorization.

898981999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30233088, while the sum is 70.

The square root of 898981999 is about 29983.0285161456. The cubic root of 898981999 is about 965.1252216536.

The spelling of 898981999 in words is "eight hundred ninety-eight million, nine hundred eighty-one thousand, nine hundred ninety-nine".