671125731 has 4 divisors (see below), whose sum is σ = 894834312. Its totient is φ = 447417152.

The previous prime is 671125723. The next prime is 671125747. The reversal of 671125731 is 137521176.

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

It is a cyclic number.

It is not a de Polignac number, because 671125731 - 2³ = 671125723 is a prime.

It is a super-2 number, since 2×671125731² = 900819493620568722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 671125692 and 671125701.

It is not an unprimeable number, because it can be changed into a prime (671125781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111854286 + ... + 111854291.

It is an arithmetic number, because the mean of its divisors is an integer number (223708578).

Almost surely, 2^671125731 is an apocalyptic number.

671125731 is a deficient number, since it is larger than the sum of its proper divisors (223708581).

671125731 is a wasteful number, since it uses less digits than its factorization.

671125731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223708580.

The product of its digits is 8820, while the sum is 33.

The square root of 671125731 is about 25906.0944760109. The cubic root of 671125731 is about 875.5238141412.

The spelling of 671125731 in words is "six hundred seventy-one million, one hundred twenty-five thousand, seven hundred thirty-one".