919920089 has 8 divisors (see below), whose sum is σ = 1013293632. Its totient is φ = 828170640.

The previous prime is 919920059. The next prime is 919920103. The reversal of 919920089 is 980029919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 919920089 - 2¹⁶ = 919854553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919920059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404834 + ... + 407099.

It is an arithmetic number, because the mean of its divisors is an integer number (126661704).

Almost surely, 2^919920089 is an apocalyptic number.

It is an amenable number.

919920089 is a deficient number, since it is larger than the sum of its proper divisors (93373543).

919920089 is a wasteful number, since it uses less digits than its factorization.

919920089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812047.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 919920089 is about 30330.1844537748. The cubic root of 919920089 is about 972.5606657855.

The spelling of 919920089 in words is "nine hundred nineteen million, nine hundred twenty thousand, eighty-nine".