140493609 has 21 divisors (see below), whose sum is σ = 211124973. Its totient is φ = 93449052.

The previous prime is 140493557. The next prime is 140493611. The reversal of 140493609 is 906394041.

The square root of 140493609 is 11853.

It is a perfect power (a square), and thus also a powerful number.

140493609 is a `hidden beast` number, since 1 + 4 + 0 + 49 + 3 + 609 = 666.

140493609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140493609 - 2⁹ = 140493097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140493629) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 319812 + ... + 320250.

Almost surely, 2^140493609 is an apocalyptic number.

140493609 is the 11853-rd square number.

140493609 is the 5927-th centered octagonal number.

It is an amenable number.

140493609 is a deficient number, since it is larger than the sum of its proper divisors (70631364).

140493609 is an frugal number, since it uses more digits than its factorization.

140493609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The cubic root of 140493609 is about 519.8589471958.

Multiplying 140493609 by its sum of digits (36), we get a square (5057769924 = 71118²).

The spelling of 140493609 in words is "one hundred forty million, four hundred ninety-three thousand, six hundred nine".