672005787 has 4 divisors (see below), whose sum is σ = 896007720. Its totient is φ = 448003856.

The previous prime is 672005753. The next prime is 672005791. The reversal of 672005787 is 787500276.

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 672005787 - 2¹² = 672001691 is a prime.

It is a super-2 number, since 2×672005787² = 903183555522978738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (672005717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112000962 + ... + 112000967.

It is an arithmetic number, because the mean of its divisors is an integer number (224001930).

Almost surely, 2^672005787 is an apocalyptic number.

672005787 is a deficient number, since it is larger than the sum of its proper divisors (224001933).

672005787 is a wasteful number, since it uses less digits than its factorization.

672005787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224001932.

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 672005787 is about 25923.0744125769. The cubic root of 672005787 is about 875.9063422836.

The spelling of 672005787 in words is "six hundred seventy-two million, five thousand, seven hundred eighty-seven".