140991398 has 8 divisors (see below), whose sum is σ = 212656080. Its totient is φ = 70106040.

The previous prime is 140991293. The next prime is 140991427. The reversal of 140991398 is 893199041.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194378 + ... + 195101.

It is an arithmetic number, because the mean of its divisors is an integer number (26582010).

Almost surely, 2^140991398 is an apocalyptic number.

140991398 is a deficient number, since it is larger than the sum of its proper divisors (71664682).

140991398 is a wasteful number, since it uses less digits than its factorization.

140991398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389662.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 140991398 is about 11873.9798719722. The cubic root of 140991398 is about 520.4722017437.

The spelling of 140991398 in words is "one hundred forty million, nine hundred ninety-one thousand, three hundred ninety-eight".