898661887 has 2 divisors, whose sum is σ = 898661888. Its totient is φ = 898661886.

The previous prime is 898661861. The next prime is 898661899. The reversal of 898661887 is 788166898.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 898661887 - 2¹⁹ = 898137599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898661857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449330943 + 449330944.

It is an arithmetic number, because the mean of its divisors is an integer number (449330944).

Almost surely, 2^898661887 is an apocalyptic number.

898661887 is a deficient number, since it is larger than the sum of its proper divisors (1).

898661887 is an equidigital number, since it uses as much as digits as its factorization.

898661887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9289728, while the sum is 61.

The square root of 898661887 is about 29977.6898209318. The cubic root of 898661887 is about 965.0106532333.

The spelling of 898661887 in words is "eight hundred ninety-eight million, six hundred sixty-one thousand, eight hundred eighty-seven".