140188389 has 16 divisors (see below), whose sum is σ = 208885824. Its totient is φ = 82889600.

The previous prime is 140188387. The next prime is 140188393. The reversal of 140188389 is 983881041.

140188389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 140188389 - 2¹ = 140188387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140188389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140188387) 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, 50454 + ... + 53159.

It is an arithmetic number, because the mean of its divisors is an integer number (13055364).

Almost surely, 2^140188389 is an apocalyptic number.

It is an amenable number.

140188389 is a deficient number, since it is larger than the sum of its proper divisors (68697435).

140188389 is a wasteful number, since it uses less digits than its factorization.

140188389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103668.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 140188389 is about 11840.1177781304. The cubic root of 140188389 is about 519.4822126442.

The spelling of 140188389 in words is "one hundred forty million, one hundred eighty-eight thousand, three hundred eighty-nine".