19161089 has 8 divisors (see below), whose sum is σ = 19460448. Its totient is φ = 18864000.

The previous prime is 19161059. The next prime is 19161097. The reversal of 19161089 is 98016191.

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

It is a cyclic number.

It is not a de Polignac number, because 19161089 - 2¹⁶ = 19095553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19161029) 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, 23954 + ... + 24740.

It is an arithmetic number, because the mean of its divisors is an integer number (2432556).

It is a Proth number, since it is equal to 2339 ⋅ 2¹³ + 1 and 2339 < 2¹³.

Almost surely, 2^19161089 is an apocalyptic number.

It is an amenable number.

19161089 is a deficient number, since it is larger than the sum of its proper divisors (299359).

19161089 is an equidigital number, since it uses as much as digits as its factorization.

19161089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 19161089 is about 4377.3381180804. The cubic root of 19161089 is about 267.5921666858.

The spelling of 19161089 in words is "nineteen million, one hundred sixty-one thousand, eighty-nine".