34931721 has 16 divisors (see below), whose sum is σ = 50915520. Its totient is φ = 21126720.

The previous prime is 34931707. The next prime is 34931749. The reversal of 34931721 is 12713943.

It is not a de Polignac number, because 34931721 - 2⁶ = 34931657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (34931021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22651 + ... + 24143.

It is an arithmetic number, because the mean of its divisors is an integer number (3182220).

Almost surely, 2^34931721 is an apocalyptic number.

It is an amenable number.

34931721 is a deficient number, since it is larger than the sum of its proper divisors (15983799).

34931721 is a wasteful number, since it uses less digits than its factorization.

34931721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216.

The product of its digits is 4536, while the sum is 30.

The square root of 34931721 is about 5910.3063372384. The cubic root of 34931721 is about 326.8937828948.

The spelling of 34931721 in words is "thirty-four million, nine hundred thirty-one thousand, seven hundred twenty-one".