34195781 has 2 divisors, whose sum is σ = 34195782. Its totient is φ = 34195780.

The previous prime is 34195753. The next prime is 34195813. The reversal of 34195781 is 18759143.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 14250625 = 4466^2 + 3775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34195781 is a prime.

It is a super-2 number, since 2×34195781² = 2338702876399922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34195081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17097890 + 17097891.

It is an arithmetic number, because the mean of its divisors is an integer number (17097891).

Almost surely, 2^34195781 is an apocalyptic number.

It is an amenable number.

34195781 is a deficient number, since it is larger than the sum of its proper divisors (1).

34195781 is an equidigital number, since it uses as much as digits as its factorization.

34195781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 34195781 is about 5847.7158788710. The cubic root of 34195781 is about 324.5818084768.

The spelling of 34195781 in words is "thirty-four million, one hundred ninety-five thousand, seven hundred eighty-one".