898491901 has 2 divisors, whose sum is σ = 898491902. Its totient is φ = 898491900.

The previous prime is 898491857. The next prime is 898491961. The reversal of 898491901 is 109194898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792422500 + 106069401 = 28150^2 + 10299^2 .

It is a cyclic number.

It is not a de Polignac number, because 898491901 - 2⁷ = 898491773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898491961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449245950 + 449245951.

It is an arithmetic number, because the mean of its divisors is an integer number (449245951).

Almost surely, 2^898491901 is an apocalyptic number.

It is an amenable number.

898491901 is a deficient number, since it is larger than the sum of its proper divisors (1).

898491901 is an equidigital number, since it uses as much as digits as its factorization.

898491901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 49.

The square root of 898491901 is about 29974.8544783790. The cubic root of 898491901 is about 964.9498040058.

The spelling of 898491901 in words is "eight hundred ninety-eight million, four hundred ninety-one thousand, nine hundred one".