34211991 has 16 divisors (see below), whose sum is σ = 49996800. Its totient is φ = 20637120.

The previous prime is 34211987. The next prime is 34212011. The reversal of 34211991 is 19911243.

It is not a de Polignac number, because 34211991 - 2² = 34211987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34211921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5035 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (3124800).

Almost surely, 2^34211991 is an apocalyptic number.

34211991 is a deficient number, since it is larger than the sum of its proper divisors (15784809).

34211991 is a wasteful number, since it uses less digits than its factorization.

34211991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4886.

The product of its digits is 1944, while the sum is 30.

The square root of 34211991 is about 5849.1017259063. The cubic root of 34211991 is about 324.6330880968.

The spelling of 34211991 in words is "thirty-four million, two hundred eleven thousand, nine hundred ninety-one".