34403781 has 4 divisors (see below), whose sum is σ = 45871712. Its totient is φ = 22935852.

The previous prime is 34403777. The next prime is 34403783. The reversal of 34403781 is 18730443.

34403781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 18730443 = 3 ⋅6243481.

It is not a de Polignac number, because 34403781 - 2² = 34403777 is a prime.

It is a super-2 number, since 2×34403781² = 2367240294191922, which 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 (34403783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5733961 + ... + 5733966.

It is an arithmetic number, because the mean of its divisors is an integer number (11467928).

Almost surely, 2^34403781 is an apocalyptic number.

It is an amenable number.

34403781 is a deficient number, since it is larger than the sum of its proper divisors (11467931).

34403781 is a wasteful number, since it uses less digits than its factorization.

34403781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11467930.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 34403781 is about 5865.4736381643. The cubic root of 34403781 is about 325.2385814228.

The spelling of 34403781 in words is "thirty-four million, four hundred three thousand, seven hundred eighty-one".