1970000191 has 2 divisors, whose sum is σ = 1970000192. Its totient is φ = 1970000190.

The previous prime is 1970000143. The next prime is 1970000297. The reversal of 1970000191 is 1910000791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1970000191 - 2¹⁷ = 1969869119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1970009191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985000095 + 985000096.

It is an arithmetic number, because the mean of its divisors is an integer number (985000096).

Almost surely, 2^1970000191 is an apocalyptic number.

1970000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970000191 is an equidigital number, since it uses as much as digits as its factorization.

1970000191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 1970000191 is about 44384.6841939875. The cubic root of 1970000191 is about 1253.5897219952.

The spelling of 1970000191 in words is "one billion, nine hundred seventy million, one hundred ninety-one", and thus it is an aban number.