140203391 has 8 divisors (see below), whose sum is σ = 144458640. Its totient is φ = 136007872.

The previous prime is 140203387. The next prime is 140203493. The reversal of 140203391 is 193302041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140203391 - 2² = 140203387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140203691) 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 7 ways as a sum of consecutive naturals, for example, 10145 + ... + 19578.

It is an arithmetic number, because the mean of its divisors is an integer number (18057330).

Almost surely, 2^140203391 is an apocalyptic number.

140203391 is a deficient number, since it is larger than the sum of its proper divisors (4255249).

140203391 is an equidigital number, since it uses as much as digits as its factorization.

140203391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29865.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 140203391 is about 11840.7512852859. The cubic root of 140203391 is about 519.5007424579.

The spelling of 140203391 in words is "one hundred forty million, two hundred three thousand, three hundred ninety-one".