1964635 has 4 divisors (see below), whose sum is σ = 2357568. Its totient is φ = 1571704.

The previous prime is 1964629. The next prime is 1964659. The reversal of 1964635 is 5364691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5364691 = 227 ⋅23633.

It is a cyclic number.

It is not a de Polignac number, because 1964635 - 2⁵ = 1964603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1964635.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196459 + ... + 196468.

It is an arithmetic number, because the mean of its divisors is an integer number (589392).

2^1964635 is an apocalyptic number.

1964635 is a deficient number, since it is larger than the sum of its proper divisors (392933).

1964635 is an equidigital number, since it uses as much as digits as its factorization.

1964635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392932.

The product of its digits is 19440, while the sum is 34.

The square root of 1964635 is about 1401.6543796528. The cubic root of 1964635 is about 125.2450658943.

The spelling of 1964635 in words is "one million, nine hundred sixty-four thousand, six hundred thirty-five".