1964643 has 8 divisors (see below), whose sum is σ = 2627088. Its totient is φ = 1305984.

The previous prime is 1964629. The next prime is 1964659. The reversal of 1964643 is 3464691.

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

It is not a de Polignac number, because 1964643 - 2⁶ = 1964579 is a prime.

It is a d-powerful number, because it can be written as 1 + 9 + 6⁷ + 4⁴ + 6⁸ + 4⁶ + 3⁶ .

1964643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1964603) 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, 655 + ... + 2087.

It is an arithmetic number, because the mean of its divisors is an integer number (328386).

2^1964643 is an apocalyptic number.

1964643 is a deficient number, since it is larger than the sum of its proper divisors (662445).

1964643 is a wasteful number, since it uses less digits than its factorization.

1964643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893.

The product of its digits is 15552, while the sum is 33.

The square root of 1964643 is about 1401.6572334205. The cubic root of 1964643 is about 125.2452358935.

The spelling of 1964643 in words is "one million, nine hundred sixty-four thousand, six hundred forty-three".