6418949 has 2 divisors, whose sum is σ = 6418950. Its totient is φ = 6418948.

The previous prime is 6418943. The next prime is 6418967. The reversal of 6418949 is 9498146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3214849 + 3204100 = 1793^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 6418949 - 2⁸ = 6418693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6418943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209474 + 3209475.

It is an arithmetic number, because the mean of its divisors is an integer number (3209475).

Almost surely, 2^6418949 is an apocalyptic number.

It is an amenable number.

6418949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6418949 is an equidigital number, since it uses as much as digits as its factorization.

6418949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 6418949 is about 2533.5644850684. The cubic root of 6418949 is about 185.8466091896.

The spelling of 6418949 in words is "six million, four hundred eighteen thousand, nine hundred forty-nine".