34397978 has 4 divisors (see below), whose sum is σ = 51596970. Its totient is φ = 17198988.

The previous prime is 34397977. The next prime is 34397981. The reversal of 34397978 is 87979343.

34397978 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: 87979343 = 653 ⋅134731.

It can be written as a sum of positive squares in only one way, i.e., 24930049 + 9467929 = 4993^2 + 3077^2 .

It is not an unprimeable number, because it can be changed into a prime (34397977) 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 as a sum of consecutive naturals, namely, 8599493 + ... + 8599496.

Almost surely, 2^34397978 is an apocalyptic number.

34397978 is a deficient number, since it is larger than the sum of its proper divisors (17198992).

34397978 is a wasteful number, since it uses less digits than its factorization.

34397978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17198991.

The product of its digits is 1143072, while the sum is 50.

The square root of 34397978 is about 5864.9789428437. The cubic root of 34397978 is about 325.2202940373.

The spelling of 34397978 in words is "thirty-four million, three hundred ninety-seven thousand, nine hundred seventy-eight".