140641409 has 4 divisors (see below), whose sum is σ = 142421760. Its totient is φ = 138861060.

The previous prime is 140641393. The next prime is 140641411. The reversal of 140641409 is 904146041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140641409 - 2⁴ = 140641393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140641429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890057 + ... + 890214.

It is an arithmetic number, because the mean of its divisors is an integer number (35605440).

Almost surely, 2^140641409 is an apocalyptic number.

It is an amenable number.

140641409 is a deficient number, since it is larger than the sum of its proper divisors (1780351).

140641409 is an equidigital number, since it uses as much as digits as its factorization.

140641409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780350.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 140641409 is about 11859.2330696382. The cubic root of 140641409 is about 520.0411814032.

The spelling of 140641409 in words is "one hundred forty million, six hundred forty-one thousand, four hundred nine".