34991991 has 6 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 23327988.

The previous prime is 34991989. The next prime is 34992007. The reversal of 34991991 is 19919943.

It is not a de Polignac number, because 34991991 - 2¹ = 34991989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34991911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1943991 + ... + 1944008.

It is an arithmetic number, because the mean of its divisors is an integer number (8424000).

Almost surely, 2^34991991 is an apocalyptic number.

34991991 is a deficient number, since it is larger than the sum of its proper divisors (15552009).

34991991 is a wasteful number, since it uses less digits than its factorization.

34991991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888005 (or 3888002 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 34991991 is about 5915.4028603300. The cubic root of 34991991 is about 327.0816786678.

It can be divided in two parts, 3 and 4991991, that added together give a palindrome (4991994).

The spelling of 34991991 in words is "thirty-four million, nine hundred ninety-one thousand, nine hundred ninety-one".