34287991 has 4 divisors (see below), whose sum is σ = 34303984. Its totient is φ = 34272000.

The previous prime is 34287983. The next prime is 34288049. The reversal of 34287991 is 19978243.

34287991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 34287991 - 2³ = 34287983 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 (34287091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4170 + ... + 9271.

It is an arithmetic number, because the mean of its divisors is an integer number (8575996).

Almost surely, 2^34287991 is an apocalyptic number.

34287991 is a deficient number, since it is larger than the sum of its proper divisors (15993).

34287991 is a wasteful number, since it uses less digits than its factorization.

34287991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15992.

The product of its digits is 108864, while the sum is 43.

The square root of 34287991 is about 5855.5948459572. The cubic root of 34287991 is about 324.8732949877.

The spelling of 34287991 in words is "thirty-four million, two hundred eighty-seven thousand, nine hundred ninety-one".