1965505417 has 4 divisors (see below), whose sum is σ = 1973153556. Its totient is φ = 1957857280.

The previous prime is 1965505403. The next prime is 1965505433. The reversal of 1965505417 is 7145055691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7145055691 = 41 ⋅174269651.

It can be written as a sum of positive squares in 2 ways, for example, as 1745902656 + 219602761 = 41784^2 + 14819^2 .

It is a cyclic number.

It is not a de Polignac number, because 1965505417 - 2²³ = 1957116809 is a prime.

It is a super-3 number, since 3×1965505417³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965502417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3823684 + ... + 3824197.

It is an arithmetic number, because the mean of its divisors is an integer number (493288389).

Almost surely, 2^1965505417 is an apocalyptic number.

It is an amenable number.

1965505417 is a deficient number, since it is larger than the sum of its proper divisors (7648139).

1965505417 is an equidigital number, since it uses as much as digits as its factorization.

1965505417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7648138.

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 1965505417 is about 44334.0209884012. The cubic root of 1965505417 is about 1252.6355946337.

The spelling of 1965505417 in words is "one billion, nine hundred sixty-five million, five hundred five thousand, four hundred seventeen".