140959309 has 8 divisors (see below), whose sum is σ = 148796480. Its totient is φ = 133533900.

The previous prime is 140959283. The next prime is 140959327. The reversal of 140959309 is 903959041.

It is a de Polignac number, because none of the positive numbers 2^k-140959309 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 (140959009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3417 + ... + 17134.

It is an arithmetic number, because the mean of its divisors is an integer number (18599560).

Almost surely, 2^140959309 is an apocalyptic number.

140959309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

140959309 is a deficient number, since it is larger than the sum of its proper divisors (7837171).

140959309 is an frugal number, since it uses more digits than its factorization.

140959309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20608 (or 20570 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 140959309 is about 11872.6285632121. The cubic root of 140959309 is about 520.4327130469.

The spelling of 140959309 in words is "one hundred forty million, nine hundred fifty-nine thousand, three hundred nine".