140109479 has 2 divisors, whose sum is σ = 140109480. Its totient is φ = 140109478.

The previous prime is 140109467. The next prime is 140109481. The reversal of 140109479 is 974901041.

It is a strong prime.

It is an emirp because it is prime and its reverse (974901041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140109479 - 2²⁰ = 139060903 is a prime.

It is a super-2 number, since 2×140109479² = 39261332211302882, which contains 22 as substring.

Together with 140109481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140109379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70054739 + 70054740.

It is an arithmetic number, because the mean of its divisors is an integer number (70054740).

Almost surely, 2^140109479 is an apocalyptic number.

140109479 is a deficient number, since it is larger than the sum of its proper divisors (1).

140109479 is an equidigital number, since it uses as much as digits as its factorization.

140109479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 140109479 is about 11836.7849942457. The cubic root of 140109479 is about 519.3847246962.

The spelling of 140109479 in words is "one hundred forty million, one hundred nine thousand, four hundred seventy-nine".