679821801 has 8 divisors (see below), whose sum is σ = 907166784. Its totient is φ = 452845680.

The previous prime is 679821719. The next prime is 679821803. The reversal of 679821801 is 108128976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 679821801 - 2¹⁰ = 679820777 is a prime.

It is a super-2 number, since 2×679821801² = 924315362229767202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679821803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87885 + ... + 95306.

It is an arithmetic number, because the mean of its divisors is an integer number (113395848).

Almost surely, 2^679821801 is an apocalyptic number.

It is an amenable number.

679821801 is a deficient number, since it is larger than the sum of its proper divisors (227344983).

679821801 is a wasteful number, since it uses less digits than its factorization.

679821801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184431.

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 679821801 is about 26073.3925870800. The cubic root of 679821801 is about 879.2891129510.

The spelling of 679821801 in words is "six hundred seventy-nine million, eight hundred twenty-one thousand, eight hundred one".