672735987 has 48 divisors (see below), whose sum is σ = 1214004480. Its totient is φ = 348753600.

The previous prime is 672735971. The next prime is 672736013. The reversal of 672735987 is 789537276.

It is not a de Polignac number, because 672735987 - 2⁴ = 672735971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (672735937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 573912 + ... + 575082.

It is an arithmetic number, because the mean of its divisors is an integer number (25291760).

Almost surely, 2^672735987 is an apocalyptic number.

672735987 is a deficient number, since it is larger than the sum of its proper divisors (541268493).

672735987 is a wasteful number, since it uses less digits than its factorization.

672735987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024 (or 2021 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 54.

The square root of 672735987 is about 25937.1545663745. The cubic root of 672735987 is about 876.2234800748.

The spelling of 672735987 in words is "six hundred seventy-two million, seven hundred thirty-five thousand, nine hundred eighty-seven".