1956623 has 4 divisors (see below), whose sum is σ = 1961520. Its totient is φ = 1951728.

The previous prime is 1956613. The next prime is 1956631. The reversal of 1956623 is 3266591.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1956623 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 1956623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956613) 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, 1790 + ... + 2667.

It is an arithmetic number, because the mean of its divisors is an integer number (490380).

2^1956623 is an apocalyptic number.

1956623 is a deficient number, since it is larger than the sum of its proper divisors (4897).

1956623 is an equidigital number, since it uses as much as digits as its factorization.

1956623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896.

The product of its digits is 9720, while the sum is 32.

The square root of 1956623 is about 1398.7934086204. The cubic root of 1956623 is about 125.0745794943.

Subtracting from 1956623 its sum of digits (32), we obtain a palindrome (1956591).

It can be divided in two parts, 195662 and 3, that multiplied together give a triangular number (586986 = T₁₀₈₃).

The spelling of 1956623 in words is "one million, nine hundred fifty-six thousand, six hundred twenty-three".