1906326139 has 2 divisors, whose sum is σ = 1906326140. Its totient is φ = 1906326138.

The previous prime is 1906326077. The next prime is 1906326151. The reversal of 1906326139 is 9316236091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1906326139 - 2¹⁹ = 1905801851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1906324139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953163069 + 953163070.

It is an arithmetic number, because the mean of its divisors is an integer number (953163070).

Almost surely, 2^1906326139 is an apocalyptic number.

1906326139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906326139 is an equidigital number, since it uses as much as digits as its factorization.

1906326139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 1906326139 is about 43661.4949240174. The cubic root of 1906326139 is about 1239.9354239264.

The spelling of 1906326139 in words is "one billion, nine hundred six million, three hundred twenty-six thousand, one hundred thirty-nine".