672079987 has 4 divisors (see below), whose sum is σ = 701300880. Its totient is φ = 642859096.

The previous prime is 672079973. The next prime is 672079997. The reversal of 672079987 is 789970276.

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 672079987 - 2¹⁹ = 671555699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672079927) 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, 14610412 + ... + 14610457.

It is an arithmetic number, because the mean of its divisors is an integer number (175325220).

Almost surely, 2^672079987 is an apocalyptic number.

672079987 is a deficient number, since it is larger than the sum of its proper divisors (29220893).

672079987 is a wasteful number, since it uses less digits than its factorization.

672079987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29220892.

The product of its (nonzero) digits is 2667168, while the sum is 55.

The square root of 672079987 is about 25924.5055304822. The cubic root of 672079987 is about 875.9385790391.

The spelling of 672079987 in words is "six hundred seventy-two million, seventy-nine thousand, nine hundred eighty-seven".