140240399 has 4 divisors (see below), whose sum is σ = 151028136. Its totient is φ = 129452664.

The previous prime is 140240393. The next prime is 140240423. The reversal of 140240399 is 993042041.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 140240399 - 2⁴ = 140240383 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 (140240393) 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, 5393849 + ... + 5393874.

It is an arithmetic number, because the mean of its divisors is an integer number (37757034).

Almost surely, 2^140240399 is an apocalyptic number.

140240399 is a deficient number, since it is larger than the sum of its proper divisors (10787737).

140240399 is a wasteful number, since it uses less digits than its factorization.

140240399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10787736.

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

The square root of 140240399 is about 11842.3139208518. The cubic root of 140240399 is about 519.5464474678.

The spelling of 140240399 in words is "one hundred forty million, two hundred forty thousand, three hundred ninety-nine".