34978387 has 4 divisors (see below), whose sum is σ = 35722656. Its totient is φ = 34234120.

The previous prime is 34978381. The next prime is 34978397. The reversal of 34978387 is 78387943.

34978387 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, and also an emirpimes, since its reverse is a distinct semiprime: 78387943 = 919 ⋅85297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34978387 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 34978387.

It is not an unprimeable number, because it can be changed into a prime (34978381) 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, 372064 + ... + 372157.

It is an arithmetic number, because the mean of its divisors is an integer number (8930664).

Almost surely, 2^34978387 is an apocalyptic number.

34978387 is a deficient number, since it is larger than the sum of its proper divisors (744269).

34978387 is an equidigital number, since it uses as much as digits as its factorization.

34978387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744268.

The product of its digits is 1016064, while the sum is 49.

The square root of 34978387 is about 5914.2528691289. The cubic root of 34978387 is about 327.0392861489.

The spelling of 34978387 in words is "thirty-four million, nine hundred seventy-eight thousand, three hundred eighty-seven".