140473291 has 4 divisors (see below), whose sum is σ = 160540912. Its totient is φ = 120405672.

The previous prime is 140473279. The next prime is 140473309. The reversal of 140473291 is 192374041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140473291 - 2⁷ = 140473163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140473211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10033800 + ... + 10033813.

It is an arithmetic number, because the mean of its divisors is an integer number (40135228).

Almost surely, 2^140473291 is an apocalyptic number.

140473291 is a deficient number, since it is larger than the sum of its proper divisors (20067621).

140473291 is an equidigital number, since it uses as much as digits as its factorization.

140473291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20067620.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 140473291 is about 11852.1428864151. The cubic root of 140473291 is about 519.8338855497.

The spelling of 140473291 in words is "one hundred forty million, four hundred seventy-three thousand, two hundred ninety-one".