6500981 has 2 divisors, whose sum is σ = 6500982. Its totient is φ = 6500980.

The previous prime is 6500971. The next prime is 6501007. The reversal of 6500981 is 1890056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4036081 + 2464900 = 2009^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 6500981 - 2²² = 2306677 is a prime.

It is a super-2 number, since 2×6500981² = 84525507924722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6500941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250490 + 3250491.

It is an arithmetic number, because the mean of its divisors is an integer number (3250491).

Almost surely, 2^6500981 is an apocalyptic number.

It is an amenable number.

6500981 is a deficient number, since it is larger than the sum of its proper divisors (1).

6500981 is an equidigital number, since it uses as much as digits as its factorization.

6500981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 6500981 is about 2549.7021394665. The cubic root of 6500981 is about 186.6349460697.

The spelling of 6500981 in words is "six million, five hundred thousand, nine hundred eighty-one".