104617661 has 2 divisors, whose sum is σ = 104617662. Its totient is φ = 104617660.

The previous prime is 104617657. The next prime is 104617663. The reversal of 104617661 is 166716401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101707225 + 2910436 = 10085^2 + 1706^2 .

It is a cyclic number.

It is not a de Polignac number, because 104617661 - 2² = 104617657 is a prime.

It is a super-2 number, since 2×104617661² = 21889709986221842, which contains 22 as substring.

Together with 104617663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104617663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52308830 + 52308831.

It is an arithmetic number, because the mean of its divisors is an integer number (52308831).

Almost surely, 2^104617661 is an apocalyptic number.

It is an amenable number.

104617661 is a deficient number, since it is larger than the sum of its proper divisors (1).

104617661 is an equidigital number, since it uses as much as digits as its factorization.

104617661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 104617661 is about 10228.2775187223. The cubic root of 104617661 is about 471.1960798746.

The spelling of 104617661 in words is "one hundred four million, six hundred seventeen thousand, six hundred sixty-one".