8261749 has 2 divisors, whose sum is σ = 8261750. Its totient is φ = 8261748.

The previous prime is 8261689. The next prime is 8261783. The reversal of 8261749 is 9471628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7387524 + 874225 = 2718^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 8261749 - 2⁷ = 8261621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8264749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4130874 + 4130875.

It is an arithmetic number, because the mean of its divisors is an integer number (4130875).

Almost surely, 2^8261749 is an apocalyptic number.

It is an amenable number.

8261749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8261749 is an equidigital number, since it uses as much as digits as its factorization.

8261749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 8261749 is about 2874.3258340000. The cubic root of 8261749 is about 202.1578757937.

The spelling of 8261749 in words is "eight million, two hundred sixty-one thousand, seven hundred forty-nine".