34781893 has 2 divisors, whose sum is σ = 34781894. Its totient is φ = 34781892.

The previous prime is 34781891. The next prime is 34781917. The reversal of 34781893 is 39818743.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29615364 + 5166529 = 5442^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 34781893 - 2¹ = 34781891 is a prime.

Together with 34781891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34781891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17390946 + 17390947.

It is an arithmetic number, because the mean of its divisors is an integer number (17390947).

Almost surely, 2^34781893 is an apocalyptic number.

It is an amenable number.

34781893 is a deficient number, since it is larger than the sum of its proper divisors (1).

34781893 is an equidigital number, since it uses as much as digits as its factorization.

34781893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 34781893 is about 5897.6175698328. The cubic root of 34781893 is about 326.4257457034.

The spelling of 34781893 in words is "thirty-four million, seven hundred eighty-one thousand, eight hundred ninety-three".