6172987 has 2 divisors, whose sum is σ = 6172988. Its totient is φ = 6172986.

The previous prime is 6172949. The next prime is 6173003. The reversal of 6172987 is 7892716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6172987 - 2¹⁵ = 6140219 is a prime.

It is not a weakly prime, because it can be changed into another prime (6172927) 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 as a sum of consecutive naturals, namely, 3086493 + 3086494.

It is an arithmetic number, because the mean of its divisors is an integer number (3086494).

Almost surely, 2^6172987 is an apocalyptic number.

6172987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6172987 is an equidigital number, since it uses as much as digits as its factorization.

6172987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 6172987 is about 2484.5496573826. The cubic root of 6172987 is about 183.4418637464.

It can be divided in two parts, 61729 and 87, that added together give a palindrome (61816).

The spelling of 6172987 in words is "six million, one hundred seventy-two thousand, nine hundred eighty-seven".