19077989 has 8 divisors (see below), whose sum is σ = 22507008. Its totient is φ = 15824880.

The previous prime is 19077979. The next prime is 19078013. The reversal of 19077989 is 98977091.

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

It is not a de Polignac number, because 19077989 - 2⁴ = 19077973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19077959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43742 + ... + 44175.

It is an arithmetic number, because the mean of its divisors is an integer number (2813376).

Almost surely, 2^19077989 is an apocalyptic number.

It is an amenable number.

19077989 is a deficient number, since it is larger than the sum of its proper divisors (3429019).

19077989 is an equidigital number, since it uses as much as digits as its factorization.

19077989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87955.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 19077989 is about 4367.8357340907. The cubic root of 19077989 is about 267.2047646744.

The spelling of 19077989 in words is "nineteen million, seventy-seven thousand, nine hundred eighty-nine".