1950838781 has 2 divisors, whose sum is σ = 1950838782. Its totient is φ = 1950838780.

The previous prime is 1950838751. The next prime is 1950838807. The reversal of 1950838781 is 1878380591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1511265625 + 439573156 = 38875^2 + 20966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1950838781 - 2²⁶ = 1883729917 is a prime.

It is a super-2 number, since 2×1950838781² = 7611543898907131922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1950838741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975419390 + 975419391.

It is an arithmetic number, because the mean of its divisors is an integer number (975419391).

Almost surely, 2^1950838781 is an apocalyptic number.

It is an amenable number.

1950838781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1950838781 is an equidigital number, since it uses as much as digits as its factorization.

1950838781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 50.

The square root of 1950838781 is about 44168.3006351841. The cubic root of 1950838781 is about 1249.5120828543.

The spelling of 1950838781 in words is "one billion, nine hundred fifty million, eight hundred thirty-eight thousand, seven hundred eighty-one".