140191879 has 2 divisors, whose sum is σ = 140191880. Its totient is φ = 140191878.

The previous prime is 140191859. The next prime is 140191907. The reversal of 140191879 is 978191041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140191879 - 2¹⁵ = 140159111 is a prime.

It is a super-3 number, since 3×140191879³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140191859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70095939 + 70095940.

It is an arithmetic number, because the mean of its divisors is an integer number (70095940).

Almost surely, 2^140191879 is an apocalyptic number.

140191879 is a deficient number, since it is larger than the sum of its proper divisors (1).

140191879 is an equidigital number, since it uses as much as digits as its factorization.

140191879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 140191879 is about 11840.2651575039. The cubic root of 140191879 is about 519.4865234574.

The spelling of 140191879 in words is "one hundred forty million, one hundred ninety-one thousand, eight hundred seventy-nine".