6722987 has 2 divisors, whose sum is σ = 6722988. Its totient is φ = 6722986.

The previous prime is 6722957. The next prime is 6723023. The reversal of 6722987 is 7892276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6722987 - 2¹⁶ = 6657451 is a prime.

It is not a weakly prime, because it can be changed into another prime (6722957) 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, 3361493 + 3361494.

It is an arithmetic number, because the mean of its divisors is an integer number (3361494).

Almost surely, 2^6722987 is an apocalyptic number.

6722987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722987 is an equidigital number, since it uses as much as digits as its factorization.

6722987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 6722987 is about 2592.8723454887. The cubic root of 6722987 is about 188.7357148963.

The spelling of 6722987 in words is "six million, seven hundred twenty-two thousand, nine hundred eighty-seven".