1964089 has 4 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 1958260.

The previous prime is 1964077. The next prime is 1964093. The reversal of 1964089 is 9804691.

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: 9804691 = 13 ⋅754207.

It is a cyclic number.

It is not a de Polignac number, because 1964089 - 2¹¹ = 1962041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377 + ... + 3094.

It is an arithmetic number, because the mean of its divisors is an integer number (492480).

2^1964089 is an apocalyptic number.

It is an amenable number.

1964089 is a deficient number, since it is larger than the sum of its proper divisors (5831).

1964089 is an equidigital number, since it uses as much as digits as its factorization.

1964089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1964089 is about 1401.4595962781. The cubic root of 1964089 is about 125.2334623578.

The spelling of 1964089 in words is "one million, nine hundred sixty-four thousand, eighty-nine".