1950940261 has 2 divisors, whose sum is σ = 1950940262. Its totient is φ = 1950940260.

The previous prime is 1950940241. The next prime is 1950940289. The reversal of 1950940261 is 1620490591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1638711361 + 312228900 = 40481^2 + 17670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1950940261 - 2⁷ = 1950940133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1950940261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1950940241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975470130 + 975470131.

It is an arithmetic number, because the mean of its divisors is an integer number (975470131).

Almost surely, 2^1950940261 is an apocalyptic number.

It is an amenable number.

1950940261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1950940261 is an equidigital number, since it uses as much as digits as its factorization.

1950940261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1950940261 is about 44169.4494079335. The cubic root of 1950940261 is about 1249.5337484559.

The spelling of 1950940261 in words is "one billion, nine hundred fifty million, nine hundred forty thousand, two hundred sixty-one".