675191987 has 4 divisors (see below), whose sum is σ = 675626640. Its totient is φ = 674757336.

The previous prime is 675191939. The next prime is 675192017. The reversal of 675191987 is 789191576.

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 675191987 - 2²² = 670997683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675191927) 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, 214988 + ... + 218105.

It is an arithmetic number, because the mean of its divisors is an integer number (168906660).

Almost surely, 2^675191987 is an apocalyptic number.

675191987 is a deficient number, since it is larger than the sum of its proper divisors (434653).

675191987 is a wasteful number, since it uses less digits than its factorization.

675191987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434652.

The product of its digits is 952560, while the sum is 53.

The square root of 675191987 is about 25984.4566423853. The cubic root of 675191987 is about 877.2884800089.

The spelling of 675191987 in words is "six hundred seventy-five million, one hundred ninety-one thousand, nine hundred eighty-seven".