673887571 has 4 divisors (see below), whose sum is σ = 770157232. Its totient is φ = 577617912.

The previous prime is 673887563. The next prime is 673887581. The reversal of 673887571 is 175788376.

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 673887571 - 2³ = 673887563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673887581) 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, 48134820 + ... + 48134833.

It is an arithmetic number, because the mean of its divisors is an integer number (192539308).

Almost surely, 2^673887571 is an apocalyptic number.

673887571 is a deficient number, since it is larger than the sum of its proper divisors (96269661).

673887571 is an equidigital number, since it uses as much as digits as its factorization.

673887571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96269660.

The product of its digits is 1975680, while the sum is 52.

The square root of 673887571 is about 25959.3445795536. The cubic root of 673887571 is about 876.7231658100.

The spelling of 673887571 in words is "six hundred seventy-three million, eight hundred eighty-seven thousand, five hundred seventy-one".