1965919741 has 4 divisors (see below), whose sum is σ = 1981399552. Its totient is φ = 1950439932.

The previous prime is 1965919727. The next prime is 1965919757. The reversal of 1965919741 is 1479195691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1479195691 = 27091 ⋅54601.

It is a cyclic number.

It is not a de Polignac number, because 1965919741 - 2¹⁵ = 1965886973 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 (1965919141) 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, 7739715 + ... + 7739968.

It is an arithmetic number, because the mean of its divisors is an integer number (495349888).

Almost surely, 2^1965919741 is an apocalyptic number.

It is an amenable number.

1965919741 is a deficient number, since it is larger than the sum of its proper divisors (15479811).

1965919741 is a wasteful number, since it uses less digits than its factorization.

1965919741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15479810.

The product of its digits is 612360, while the sum is 52.

The square root of 1965919741 is about 44338.6934967642. The cubic root of 1965919741 is about 1252.7236060128.

The spelling of 1965919741 in words is "one billion, nine hundred sixty-five million, nine hundred nineteen thousand, seven hundred forty-one".