671577487 has 12 divisors (see below), whose sum is σ = 794033256. Its totient is φ = 566198640.

The previous prime is 671577433. The next prime is 671577493. The reversal of 671577487 is 784775176.

It is a happy number.

671577487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671577487 - 2²³ = 663188879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671577187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109353 + ... + 115330.

It is an arithmetic number, because the mean of its divisors is an integer number (66169438).

Almost surely, 2^671577487 is an apocalyptic number.

671577487 is a deficient number, since it is larger than the sum of its proper divisors (122455769).

671577487 is a wasteful number, since it uses less digits than its factorization.

671577487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224758 (or 224751 counting only the distinct ones).

The product of its digits is 2304960, while the sum is 52.

The square root of 671577487 is about 25914.8121158537. The cubic root of 671577487 is about 875.7202176886.

The spelling of 671577487 in words is "six hundred seventy-one million, five hundred seventy-seven thousand, four hundred eighty-seven".