140681593 has 16 divisors (see below), whose sum is σ = 158780160. Its totient is φ = 123672384.

The previous prime is 140681591. The next prime is 140681599. The reversal of 140681593 is 395186041.

It is a cyclic number.

It is not a de Polignac number, because 140681593 - 2¹ = 140681591 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140681591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77743 + ... + 79531.

It is an arithmetic number, because the mean of its divisors is an integer number (9923760).

Almost surely, 2^140681593 is an apocalyptic number.

140681593 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

140681593 is a deficient number, since it is larger than the sum of its proper divisors (18098567).

140681593 is a wasteful number, since it uses less digits than its factorization.

140681593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 140681593 is about 11860.9271560026. The cubic root of 140681593 is about 520.0907053309.

The spelling of 140681593 in words is "one hundred forty million, six hundred eighty-one thousand, five hundred ninety-three".