140186393 has 4 divisors (see below), whose sum is σ = 140369460. Its totient is φ = 140003328.

The previous prime is 140186381. The next prime is 140186401. The reversal of 140186393 is 393681041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57957769 + 82228624 = 7613^2 + 9068^2 .

It is a cyclic number.

It is not a de Polignac number, because 140186393 - 2¹⁶ = 140120857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140186323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90380 + ... + 91917.

It is an arithmetic number, because the mean of its divisors is an integer number (35092365).

Almost surely, 2^140186393 is an apocalyptic number.

It is an amenable number.

140186393 is a deficient number, since it is larger than the sum of its proper divisors (183067).

140186393 is an equidigital number, since it uses as much as digits as its factorization.

140186393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183066.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 140186393 is about 11840.0334881283. The cubic root of 140186393 is about 519.4797471727.

The spelling of 140186393 in words is "one hundred forty million, one hundred eighty-six thousand, three hundred ninety-three".