1965652223 has 4 divisors (see below), whose sum is σ = 1966316808. Its totient is φ = 1964987640.

The previous prime is 1965652177. The next prime is 1965652229. The reversal of 1965652223 is 3222565691.

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

It is a cyclic number.

It is not a de Polignac number, because 1965652223 - 2¹⁰ = 1965651199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965652229) 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, 327836 + ... + 333777.

It is an arithmetic number, because the mean of its divisors is an integer number (491579202).

Almost surely, 2^1965652223 is an apocalyptic number.

1965652223 is a deficient number, since it is larger than the sum of its proper divisors (664585).

1965652223 is an equidigital number, since it uses as much as digits as its factorization.

1965652223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664584.

The product of its digits is 194400, while the sum is 41.

The square root of 1965652223 is about 44335.6766385718. The cubic root of 1965652223 is about 1252.6667808181. Note that the first 3 decimals are identical.

The spelling of 1965652223 in words is "one billion, nine hundred sixty-five million, six hundred fifty-two thousand, two hundred twenty-three".