140144399 has 4 divisors (see below), whose sum is σ = 147520440. Its totient is φ = 132768360.

The previous prime is 140144377. The next prime is 140144401. The reversal of 140144399 is 993441041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993441041 = 1297 ⋅765953.

It is a cyclic number.

It is not a de Polignac number, because 140144399 - 2⁸ = 140144143 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 (140144309) 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, 3687992 + ... + 3688029.

It is an arithmetic number, because the mean of its divisors is an integer number (36880110).

Almost surely, 2^140144399 is an apocalyptic number.

140144399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

140144399 is a deficient number, since it is larger than the sum of its proper divisors (7376041).

140144399 is an equidigital number, since it uses as much as digits as its factorization.

140144399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7376040.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 140144399 is about 11838.2599650455. The cubic root of 140144399 is about 519.4278704994.

The spelling of 140144399 in words is "one hundred forty million, one hundred forty-four thousand, three hundred ninety-nine".