6516949 has 2 divisors, whose sum is σ = 6516950. Its totient is φ = 6516948.

The previous prime is 6516941. The next prime is 6516959. The reversal of 6516949 is 9496156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 1249924 = 2295^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 6516949 - 2³ = 6516941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6516941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3258474 + 3258475.

It is an arithmetic number, because the mean of its divisors is an integer number (3258475).

Almost surely, 2^6516949 is an apocalyptic number.

It is an amenable number.

6516949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6516949 is an equidigital number, since it uses as much as digits as its factorization.

6516949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 6516949 is about 2552.8315651449. The cubic root of 6516949 is about 186.7876281608.

The spelling of 6516949 in words is "six million, five hundred sixteen thousand, nine hundred forty-nine".