678651034 has 4 divisors (see below), whose sum is σ = 1017976554. Its totient is φ = 339325516.

The previous prime is 678651023. The next prime is 678651037. The reversal of 678651034 is 430156876.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 523723225 + 154927809 = 22885^2 + 12447^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (678651037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169662757 + ... + 169662760.

Almost surely, 2^678651034 is an apocalyptic number.

678651034 is a deficient number, since it is larger than the sum of its proper divisors (339325520).

678651034 is a wasteful number, since it uses less digits than its factorization.

678651034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339325519.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 678651034 is about 26050.9315380468. The cubic root of 678651034 is about 878.7840618729.

The spelling of 678651034 in words is "six hundred seventy-eight million, six hundred fifty-one thousand, thirty-four".