104061989 has 2 divisors, whose sum is σ = 104061990. Its totient is φ = 104061988.

The previous prime is 104061983. The next prime is 104062001. The reversal of 104061989 is 989160401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 16265089 = 9370^2 + 4033^2 .

It is an emirp because it is prime and its reverse (989160401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104061989 - 2⁸ = 104061733 is a prime.

It is a super-2 number, since 2×104061989² = 21657795109272242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104061983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52030994 + 52030995.

It is an arithmetic number, because the mean of its divisors is an integer number (52030995).

Almost surely, 2^104061989 is an apocalyptic number.

It is an amenable number.

104061989 is a deficient number, since it is larger than the sum of its proper divisors (1).

104061989 is an equidigital number, since it uses as much as digits as its factorization.

104061989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 104061989 is about 10201.0778352094. The cubic root of 104061989 is about 470.3603528879.

Subtracting from 104061989 its sum of digits (38), we obtain a triangular number (104061951 = T₁₄₄₂₆).

The spelling of 104061989 in words is "one hundred four million, sixty-one thousand, nine hundred eighty-nine".