2091299261 has 2 divisors, whose sum is σ = 2091299262. Its totient is φ = 2091299260.

The previous prime is 2091299257. The next prime is 2091299267. The reversal of 2091299261 is 1629921902.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1942605625 + 148693636 = 44075^2 + 12194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2091299261 - 2² = 2091299257 is a prime.

It is a super-2 number, since 2×2091299261² = 8747065198118292242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091299267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045649630 + 1045649631.

It is an arithmetic number, because the mean of its divisors is an integer number (1045649631).

Almost surely, 2^2091299261 is an apocalyptic number.

It is an amenable number.

2091299261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091299261 is an equidigital number, since it uses as much as digits as its factorization.

2091299261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 2091299261 is about 45730.7255682654. The cubic root of 2091299261 is about 1278.8081477718.

The spelling of 2091299261 in words is "two billion, ninety-one million, two hundred ninety-nine thousand, two hundred sixty-one".