140024309 has 2 divisors, whose sum is σ = 140024310. Its totient is φ = 140024308.

The previous prime is 140024249. The next prime is 140024333. The reversal of 140024309 is 903420041.

140024309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137124100 + 2900209 = 11710^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 140024309 - 2¹² = 140020213 is a prime.

It is a super-2 number, since 2×140024309² = 39213614221854962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140024809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70012154 + 70012155.

It is an arithmetic number, because the mean of its divisors is an integer number (70012155).

Almost surely, 2^140024309 is an apocalyptic number.

It is an amenable number.

140024309 is a deficient number, since it is larger than the sum of its proper divisors (1).

140024309 is an equidigital number, since it uses as much as digits as its factorization.

140024309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 140024309 is about 11833.1867643505. The cubic root of 140024309 is about 519.2794618599.

The spelling of 140024309 in words is "one hundred forty million, twenty-four thousand, three hundred nine".