140840843 has 16 divisors (see below), whose sum is σ = 170806272. Its totient is φ = 114372000.

The previous prime is 140840839. The next prime is 140840897. The reversal of 140840843 is 348048041.

It is a cyclic number.

It is not a de Polignac number, because 140840843 - 2² = 140840839 is a prime.

It is a super-2 number, since 2×140840843² = 39672286113901298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140800843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11453 + ... + 20318.

It is an arithmetic number, because the mean of its divisors is an integer number (10675392).

Almost surely, 2^140840843 is an apocalyptic number.

140840843 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

140840843 is a deficient number, since it is larger than the sum of its proper divisors (29965429).

140840843 is a wasteful number, since it uses less digits than its factorization.

140840843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31826.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 140840843 is about 11867.6384761249. The cubic root of 140840843 is about 520.2868769612.

Adding to 140840843 its reverse (348048041), we get a palindrome (488888884).

The spelling of 140840843 in words is "one hundred forty million, eight hundred forty thousand, eight hundred forty-three".