104645989 has 4 divisors (see below), whose sum is σ = 119595424. Its totient is φ = 89696556.

The previous prime is 104645971. The next prime is 104646001. The reversal of 104645989 is 989546401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989546401 = 43 ⋅23012707.

It is a cyclic number.

It is not a de Polignac number, because 104645989 - 2⁷ = 104645861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104645389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7474707 + ... + 7474720.

It is an arithmetic number, because the mean of its divisors is an integer number (29898856).

Almost surely, 2^104645989 is an apocalyptic number.

It is an amenable number.

104645989 is a deficient number, since it is larger than the sum of its proper divisors (14949435).

104645989 is an equidigital number, since it uses as much as digits as its factorization.

104645989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14949434.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 104645989 is about 10229.6622133871. The cubic root of 104645989 is about 471.2386056388.

The spelling of 104645989 in words is "one hundred four million, six hundred forty-five thousand, nine hundred eighty-nine".