1951875091 has 2 divisors, whose sum is σ = 1951875092. Its totient is φ = 1951875090.

The previous prime is 1951875067. The next prime is 1951875157. The reversal of 1951875091 is 1905781591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1951875091 - 2¹⁵ = 1951842323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1951878091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 975937545 + 975937546.

It is an arithmetic number, because the mean of its divisors is an integer number (975937546).

Almost surely, 2^1951875091 is an apocalyptic number.

1951875091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1951875091 is an equidigital number, since it uses as much as digits as its factorization.

1951875091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 46.

The square root of 1951875091 is about 44180.0304549465. The cubic root of 1951875091 is about 1249.7332958458.

The spelling of 1951875091 in words is "one billion, nine hundred fifty-one million, eight hundred seventy-five thousand, ninety-one".