679145905 has 8 divisors (see below), whose sum is σ = 820373184. Its totient is φ = 539718000.

The previous prime is 679145893. The next prime is 679145921. The reversal of 679145905 is 509541976.

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

It is not a de Polignac number, because 679145905 - 2¹⁵ = 679113137 is a prime.

It is a super-2 number, since 2×679145905² = 922478320556538050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449011 + ... + 450520.

It is an arithmetic number, because the mean of its divisors is an integer number (102546648).

Almost surely, 2^679145905 is an apocalyptic number.

It is an amenable number.

679145905 is a deficient number, since it is larger than the sum of its proper divisors (141227279).

679145905 is a wasteful number, since it uses less digits than its factorization.

679145905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899687.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 679145905 is about 26060.4279512060. The cubic root of 679145905 is about 878.9976125113.

The spelling of 679145905 in words is "six hundred seventy-nine million, one hundred forty-five thousand, nine hundred five".