801749261 has 2 divisors, whose sum is σ = 801749262. Its totient is φ = 801749260.

The previous prime is 801749237. The next prime is 801749287. The reversal of 801749261 is 162947108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 794958025 + 6791236 = 28195^2 + 2606^2 .

It is a cyclic number.

It is not a de Polignac number, because 801749261 - 2⁶ = 801749197 is a prime.

It is a super-2 number, since 2×801749261² = 1285603755028092242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801742261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400874630 + 400874631.

It is an arithmetic number, because the mean of its divisors is an integer number (400874631).

Almost surely, 2^801749261 is an apocalyptic number.

It is an amenable number.

801749261 is a deficient number, since it is larger than the sum of its proper divisors (1).

801749261 is an equidigital number, since it uses as much as digits as its factorization.

801749261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 801749261 is about 28315.1772199999. The cubic root of 801749261 is about 928.9938866928.

The spelling of 801749261 in words is "eight hundred one million, seven hundred forty-nine thousand, two hundred sixty-one".