671112901 has 4 divisors (see below), whose sum is σ = 671206572. Its totient is φ = 671019232.

The previous prime is 671112863. The next prime is 671112943. The reversal of 671112901 is 109211176.

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

It can be written as a sum of positive squares in 2 ways, for example, as 347076900 + 324036001 = 18630^2 + 18001^2 .

It is a cyclic number.

It is not a de Polignac number, because 671112901 - 2²¹ = 669015749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671112901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671112971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35110 + ... + 50743.

It is an arithmetic number, because the mean of its divisors is an integer number (167801643).

Almost surely, 2^671112901 is an apocalyptic number.

It is an amenable number.

671112901 is a deficient number, since it is larger than the sum of its proper divisors (93671).

671112901 is an equidigital number, since it uses as much as digits as its factorization.

671112901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93670.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 671112901 is about 25905.8468496978. The cubic root of 671112901 is about 875.5182349371.

The spelling of 671112901 in words is "six hundred seventy-one million, one hundred twelve thousand, nine hundred one".