34006781 has 4 divisors (see below), whose sum is σ = 34020000. Its totient is φ = 33993564.

The previous prime is 34006759. The next prime is 34006813. The reversal of 34006781 is 18760043.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 34006781 - 2²² = 29812477 is a prime.

It is a super-2 number, since 2×34006781² = 2312922307963922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34006381) 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, 1361 + ... + 8358.

It is an arithmetic number, because the mean of its divisors is an integer number (8505000).

Almost surely, 2^34006781 is an apocalyptic number.

It is an amenable number.

34006781 is a deficient number, since it is larger than the sum of its proper divisors (13219).

34006781 is an equidigital number, since it uses as much as digits as its factorization.

34006781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13218.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 34006781 is about 5831.5333318091. The cubic root of 34006781 is about 323.9827157624.

The spelling of 34006781 in words is "thirty-four million, six thousand, seven hundred eighty-one".