34945923781 has 4 divisors (see below), whose sum is σ = 35338574700. Its totient is φ = 34553272864.

The previous prime is 34945923763. The next prime is 34945923811. The reversal of 34945923781 is 18732954943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18732954943 = 19 ⋅985944997.

It can be written as a sum of positive squares in 2 ways, for example, as 19720584900 + 15225338881 = 140430^2 + 123391^2 .

It is a cyclic number.

It is not a de Polignac number, because 34945923781 - 2⁷ = 34945923653 is a prime.

It is a super-2 number, since 2×34945923781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34945023781) 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, 196325326 + ... + 196325503.

It is an arithmetic number, because the mean of its divisors is an integer number (8834643675).

Almost surely, 2^34945923781 is an apocalyptic number.

It is an amenable number.

34945923781 is a deficient number, since it is larger than the sum of its proper divisors (392650919).

34945923781 is an equidigital number, since it uses as much as digits as its factorization.

34945923781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392650918.

The product of its digits is 6531840, while the sum is 55.

The spelling of 34945923781 in words is "thirty-four billion, nine hundred forty-five million, nine hundred twenty-three thousand, seven hundred eighty-one".