140308249 has 4 divisors (see below), whose sum is σ = 140334336. Its totient is φ = 140282164.

The previous prime is 140308237. The next prime is 140308253. The reversal of 140308249 is 942803041.

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 a de Polignac number, because none of the positive numbers 2^k-140308249 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 140308249.

It is not an unprimeable number, because it can be changed into a prime (140308229) 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, 1669 + ... + 16834.

It is an arithmetic number, because the mean of its divisors is an integer number (35083584).

Almost surely, 2^140308249 is an apocalyptic number.

It is an amenable number.

140308249 is a deficient number, since it is larger than the sum of its proper divisors (26087).

140308249 is an equidigital number, since it uses as much as digits as its factorization.

140308249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26086.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 140308249 is about 11845.1783017395. The cubic root of 140308249 is about 519.6302215758.

The spelling of 140308249 in words is "one hundred forty million, three hundred eight thousand, two hundred forty-nine".