140024399 has 4 divisors (see below), whose sum is σ = 140059536. Its totient is φ = 139989264.

The previous prime is 140024377. The next prime is 140024411. The reversal of 140024399 is 993420041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140024399 is a prime.

It is a super-2 number, since 2×140024399² = 39213664630622402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140024309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10694 + ... + 19859.

It is an arithmetic number, because the mean of its divisors is an integer number (35014884).

Almost surely, 2^140024399 is an apocalyptic number.

140024399 is a deficient number, since it is larger than the sum of its proper divisors (35137).

140024399 is an equidigital number, since it uses as much as digits as its factorization.

140024399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35136.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 140024399 is about 11833.1905672139. The cubic root of 140024399 is about 519.2795731147.

The spelling of 140024399 in words is "one hundred forty million, twenty-four thousand, three hundred ninety-nine".