901617217 has 2 divisors, whose sum is σ = 901617218. Its totient is φ = 901617216.

The previous prime is 901617209. The next prime is 901617239. The reversal of 901617217 is 712716109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697012801 + 204604416 = 26401^2 + 14304^2 .

It is a cyclic number.

It is not a de Polignac number, because 901617217 - 2³ = 901617209 is a prime.

It is not a weakly prime, because it can be changed into another prime (901617247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450808608 + 450808609.

It is an arithmetic number, because the mean of its divisors is an integer number (450808609).

Almost surely, 2^901617217 is an apocalyptic number.

It is an amenable number.

901617217 is a deficient number, since it is larger than the sum of its proper divisors (1).

901617217 is an equidigital number, since it uses as much as digits as its factorization.

901617217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 34.

The square root of 901617217 is about 30026.9415192423. The cubic root of 901617217 is about 966.0673370295.

The spelling of 901617217 in words is "nine hundred one million, six hundred seventeen thousand, two hundred seventeen".