919073989 has 4 divisors (see below), whose sum is σ = 919601824. Its totient is φ = 918546156.

The previous prime is 919073929. The next prime is 919074001. The reversal of 919073989 is 989370919.

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: 989370919 = 661 ⋅1496779.

It is a cyclic number.

It is not a de Polignac number, because 919073989 - 2²⁹ = 382203077 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 (919073929) 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, 261297 + ... + 264790.

It is an arithmetic number, because the mean of its divisors is an integer number (229900456).

Almost surely, 2^919073989 is an apocalyptic number.

It is an amenable number.

919073989 is a deficient number, since it is larger than the sum of its proper divisors (527835).

919073989 is a wasteful number, since it uses less digits than its factorization.

919073989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527834.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 919073989 is about 30316.2330938393. The cubic root of 919073989 is about 972.2624022002.

The spelling of 919073989 in words is "nine hundred nineteen million, seventy-three thousand, nine hundred eighty-nine".