801489917 has 2 divisors, whose sum is σ = 801489918. Its totient is φ = 801489916.

The previous prime is 801489881. The next prime is 801489991. The reversal of 801489917 is 719984108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 645464836 + 156025081 = 25406^2 + 12491^2 .

It is a cyclic number.

It is not a de Polignac number, because 801489917 - 2¹⁸ = 801227773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801488917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400744958 + 400744959.

It is an arithmetic number, because the mean of its divisors is an integer number (400744959).

Almost surely, 2^801489917 is an apocalyptic number.

It is an amenable number.

801489917 is a deficient number, since it is larger than the sum of its proper divisors (1).

801489917 is an equidigital number, since it uses as much as digits as its factorization.

801489917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 801489917 is about 28310.5972561513. The cubic root of 801489917 is about 928.8937078361.

The spelling of 801489917 in words is "eight hundred one million, four hundred eighty-nine thousand, nine hundred seventeen".