140200609 has 4 divisors (see below), whose sum is σ = 140975380. Its totient is φ = 139425840.

The previous prime is 140200603. The next prime is 140200667. The reversal of 140200609 is 906002041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906002041 = 7 ⋅129428863.

It can be written as a sum of positive squares in 2 ways, for example, as 56295009 + 83905600 = 7503^2 + 9160^2 .

It is a cyclic number.

It is not a de Polignac number, because 140200609 - 2¹⁹ = 139676321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140200609.

It is not an unprimeable number, because it can be changed into a prime (140200603) 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, 387114 + ... + 387475.

It is an arithmetic number, because the mean of its divisors is an integer number (35243845).

Almost surely, 2^140200609 is an apocalyptic number.

It is an amenable number.

140200609 is a deficient number, since it is larger than the sum of its proper divisors (774771).

140200609 is an equidigital number, since it uses as much as digits as its factorization.

140200609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774770.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 140200609 is about 11840.6338090492. The cubic root of 140200609 is about 519.4973063531.

The spelling of 140200609 in words is "one hundred forty million, two hundred thousand, six hundred nine".