34491891 has 16 divisors (see below), whose sum is σ = 53782784. Its totient is φ = 19250784.

The previous prime is 34491889. The next prime is 34491893. The reversal of 34491891 is 19819443.

It is an interprime number because it is at equal distance from previous prime (34491889) and next prime (34491893).

It is not a de Polignac number, because 34491891 - 2¹ = 34491889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34491893) 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, 18196 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (3361424).

Almost surely, 2^34491891 is an apocalyptic number.

34491891 is a deficient number, since it is larger than the sum of its proper divisors (19290893).

34491891 is a wasteful number, since it uses less digits than its factorization.

34491891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38250.

The product of its digits is 31104, while the sum is 39.

The square root of 34491891 is about 5872.9797377481. The cubic root of 34491891 is about 325.5159961087.

It can be divided in two parts, 344 and 91891, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 34491891 in words is "thirty-four million, four hundred ninety-one thousand, eight hundred ninety-one".