140420191 has 2 divisors, whose sum is σ = 140420192. Its totient is φ = 140420190.

The previous prime is 140420107. The next prime is 140420219. The reversal of 140420191 is 191024041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140420191 - 2¹⁷ = 140289119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140420101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70210095 + 70210096.

It is an arithmetic number, because the mean of its divisors is an integer number (70210096).

Almost surely, 2^140420191 is an apocalyptic number.

140420191 is a deficient number, since it is larger than the sum of its proper divisors (1).

140420191 is an equidigital number, since it uses as much as digits as its factorization.

140420191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 140420191 is about 11849.9025734392. The cubic root of 140420191 is about 519.7683768732.

The spelling of 140420191 in words is "one hundred forty million, four hundred twenty thousand, one hundred ninety-one".