140503309 has 4 divisors (see below), whose sum is σ = 147898240. Its totient is φ = 133108380.

The previous prime is 140503303. The next prime is 140503327. The reversal of 140503309 is 903305041.

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 140503309 - 2³ = 140503301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140503301) 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, 3697437 + ... + 3697474.

It is an arithmetic number, because the mean of its divisors is an integer number (36974560).

Almost surely, 2^140503309 is an apocalyptic number.

140503309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

140503309 is a deficient number, since it is larger than the sum of its proper divisors (7394931).

140503309 is an equidigital number, since it uses as much as digits as its factorization.

140503309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7394930.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 140503309 is about 11853.4091720484. The cubic root of 140503309 is about 519.8709110039.

The spelling of 140503309 in words is "one hundred forty million, five hundred three thousand, three hundred nine".