3687220261 has 2 divisors, whose sum is σ = 3687220262. Its totient is φ = 3687220260.

The previous prime is 3687220217. The next prime is 3687220267. The reversal of 3687220261 is 1620227863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3480292036 + 206928225 = 58994^2 + 14385^2 .

It is a cyclic number.

It is not a de Polignac number, because 3687220261 - 2¹³ = 3687212069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3687220261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3687220267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843610130 + 1843610131.

It is an arithmetic number, because the mean of its divisors is an integer number (1843610131).

Almost surely, 2^3687220261 is an apocalyptic number.

It is an amenable number.

3687220261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687220261 is an equidigital number, since it uses as much as digits as its factorization.

3687220261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 3687220261 is about 60722.4856292955. The cubic root of 3687220261 is about 1544.8975834472.

The spelling of 3687220261 in words is "three billion, six hundred eighty-seven million, two hundred twenty thousand, two hundred sixty-one".