679061398 has 4 divisors (see below), whose sum is σ = 1018592100. Its totient is φ = 339530698.

The previous prime is 679061359. The next prime is 679061441. The reversal of 679061398 is 893160976.

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

It is a super-2 number, since 2×679061398² = 922248764507428808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169765348 + ... + 169765351.

It is an arithmetic number, because the mean of its divisors is an integer number (254648025).

Almost surely, 2^679061398 is an apocalyptic number.

679061398 is a deficient number, since it is larger than the sum of its proper divisors (339530702).

679061398 is a wasteful number, since it uses less digits than its factorization.

679061398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339530701.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 679061398 is about 26058.8065344520. The cubic root of 679061398 is about 878.9611527305.

The spelling of 679061398 in words is "six hundred seventy-nine million, sixty-one thousand, three hundred ninety-eight".