104991617 has 2 divisors, whose sum is σ = 104991618. Its totient is φ = 104991616.

The previous prime is 104991583. The next prime is 104991631. The reversal of 104991617 is 716199401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103042801 + 1948816 = 10151^2 + 1396^2 .

It is a cyclic number.

It is not a de Polignac number, because 104991617 - 2⁸ = 104991361 is a prime.

It is a super-2 number, since 2×104991617² = 22046479280549378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104991647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52495808 + 52495809.

It is an arithmetic number, because the mean of its divisors is an integer number (52495809).

Almost surely, 2^104991617 is an apocalyptic number.

It is an amenable number.

104991617 is a deficient number, since it is larger than the sum of its proper divisors (1).

104991617 is an equidigital number, since it uses as much as digits as its factorization.

104991617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 104991617 is about 10246.5417092793. The cubic root of 104991617 is about 471.7568426408.

The spelling of 104991617 in words is "one hundred four million, nine hundred ninety-one thousand, six hundred seventeen".