671286399 has 16 divisors (see below), whose sum is σ = 1047863040. Its totient is φ = 374235840.

The previous prime is 671286391. The next prime is 671286401. The reversal of 671286399 is 993682176.

It is not a de Polignac number, because 671286399 - 2³ = 671286391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671286391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388969 + ... + 390690.

It is an arithmetic number, because the mean of its divisors is an integer number (65491440).

Almost surely, 2^671286399 is an apocalyptic number.

671286399 is a deficient number, since it is larger than the sum of its proper divisors (376576641).

671286399 is a wasteful number, since it uses less digits than its factorization.

671286399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779710.

The product of its digits is 979776, while the sum is 51.

The square root of 671286399 is about 25909.1952595985. The cubic root of 671286399 is about 875.5936755843.

The spelling of 671286399 in words is "six hundred seventy-one million, two hundred eighty-six thousand, three hundred ninety-nine".