917641 has 2 divisors, whose sum is σ = 917642. Its totient is φ = 917640.

The previous prime is 917633. The next prime is 917659. The reversal of 917641 is 146719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 230400 = 829^2 + 480^2 .

It is an emirp because it is prime and its reverse (146719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 917641 - 2³ = 917633 is a prime.

It is an Ulam number.

It is equal to p₇₂₅₅₉ and since 917641 and 72559 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (917611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458820 + 458821.

It is an arithmetic number, because the mean of its divisors is an integer number (458821).

2⁹¹⁷⁶⁴¹ is an apocalyptic number.

It is an amenable number.

917641 is a deficient number, since it is larger than the sum of its proper divisors (1).

917641 is an equidigital number, since it uses as much as digits as its factorization.

917641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 917641 is about 957.9358016068. The cubic root of 917641 is about 97.1756833164.

The spelling of 917641 in words is "nine hundred seventeen thousand, six hundred forty-one".