34191947 has 4 divisors (see below), whose sum is σ = 36203256. Its totient is φ = 32180640.

The previous prime is 34191929. The next prime is 34191953. The reversal of 34191947 is 74919143.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74919143 = 13 ⋅5763011.

It is a cyclic number.

It is not a de Polignac number, because 34191947 - 2⁸ = 34191691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 34191947.

It is not an unprimeable number, because it can be changed into a prime (34191247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005629 + ... + 1005662.

It is an arithmetic number, because the mean of its divisors is an integer number (9050814).

Almost surely, 2^34191947 is an apocalyptic number.

34191947 is a deficient number, since it is larger than the sum of its proper divisors (2011309).

34191947 is a wasteful number, since it uses less digits than its factorization.

34191947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011308.

The product of its digits is 27216, while the sum is 38.

The square root of 34191947 is about 5847.3880493773. The cubic root of 34191947 is about 324.5696774173.

The spelling of 34191947 in words is "thirty-four million, one hundred ninety-one thousand, nine hundred forty-seven".