1965742133 has 4 divisors (see below), whose sum is σ = 1966389900. Its totient is φ = 1965094368.

The previous prime is 1965742123. The next prime is 1965742153. The reversal of 1965742133 is 3312475691.

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

It can be written as a sum of positive squares in 2 ways, for example, as 538564849 + 1427177284 = 23207^2 + 37778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965742133 - 2¹⁰ = 1965741109 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 (1965742123) 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, 319310 + ... + 325407.

It is an arithmetic number, because the mean of its divisors is an integer number (491597475).

Almost surely, 2^1965742133 is an apocalyptic number.

It is an amenable number.

1965742133 is a deficient number, since it is larger than the sum of its proper divisors (647767).

1965742133 is an equidigital number, since it uses as much as digits as its factorization.

1965742133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647766.

The product of its digits is 136080, while the sum is 41.

The square root of 1965742133 is about 44336.6905959387. The cubic root of 1965742133 is about 1252.6858797465.

The spelling of 1965742133 in words is "one billion, nine hundred sixty-five million, seven hundred forty-two thousand, one hundred thirty-three".