1964217 has 4 divisors (see below), whose sum is σ = 2618960. Its totient is φ = 1309476.

The previous prime is 1964213. The next prime is 1964243. The reversal of 1964217 is 7124691.

It is a happy number.

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.

It is not a de Polignac number, because 1964217 - 2² = 1964213 is a prime.

It is a D-number.

It is a Duffinian number.

1964217 is a lucky number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (1964213) 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, 327367 + ... + 327372.

It is an arithmetic number, because the mean of its divisors is an integer number (654740).

2^1964217 is an apocalyptic number.

It is an amenable number.

1964217 is a deficient number, since it is larger than the sum of its proper divisors (654743).

1964217 is an equidigital number, since it uses as much as digits as its factorization.

1964217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654742.

The product of its digits is 3024, while the sum is 30.

The square root of 1964217 is about 1401.5052622092. The cubic root of 1964217 is about 125.2361827938.

The spelling of 1964217 in words is "one million, nine hundred sixty-four thousand, two hundred seventeen".