140355391 has 8 divisors (see below), whose sum is σ = 153380304. Its totient is φ = 127374720.

The previous prime is 140355373. The next prime is 140355401. The reversal of 140355391 is 193553041.

It is a happy number.

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

It is not a de Polignac number, because 140355391 - 2⁵ = 140355359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140355091) 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, 4236 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (19172538).

Almost surely, 2^140355391 is an apocalyptic number.

140355391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

140355391 is a deficient number, since it is larger than the sum of its proper divisors (13024913).

140355391 is a wasteful number, since it uses less digits than its factorization.

140355391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22121.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 140355391 is about 11847.1680582323. The cubic root of 140355391 is about 519.6884117038.

The spelling of 140355391 in words is "one hundred forty million, three hundred fifty-five thousand, three hundred ninety-one".