34743821 has 4 divisors (see below), whose sum is σ = 39707232. Its totient is φ = 29780412.

The previous prime is 34743817. The next prime is 34743847. The reversal of 34743821 is 12834743.

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: 12834743 = 641 ⋅20023.

It is a cyclic number.

It is not a de Polignac number, because 34743821 - 2² = 34743817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34743811) 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, 2481695 + ... + 2481708.

It is an arithmetic number, because the mean of its divisors is an integer number (9926808).

Almost surely, 2^34743821 is an apocalyptic number.

It is an amenable number.

34743821 is a deficient number, since it is larger than the sum of its proper divisors (4963411).

34743821 is an equidigital number, since it uses as much as digits as its factorization.

34743821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4963410.

The product of its digits is 16128, while the sum is 32.

The square root of 34743821 is about 5894.3889420363. The cubic root of 34743821 is about 326.3066011611.

The spelling of 34743821 in words is "thirty-four million, seven hundred forty-three thousand, eight hundred twenty-one".