140207999 has 4 divisors (see below), whose sum is σ = 141897336. Its totient is φ = 138518664.

The previous prime is 140207989. The next prime is 140208001. The reversal of 140207999 is 999702041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999702041 = 13 ⋅76900157.

It is a cyclic number.

It is not a de Polignac number, because 140207999 - 2¹⁶ = 140142463 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 (140207929) 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, 844544 + ... + 844709.

It is an arithmetic number, because the mean of its divisors is an integer number (35474334).

Almost surely, 2^140207999 is an apocalyptic number.

140207999 is a deficient number, since it is larger than the sum of its proper divisors (1689337).

140207999 is an equidigital number, since it uses as much as digits as its factorization.

140207999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689336.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 140207999 is about 11840.9458659349. The cubic root of 140207999 is about 519.5064337924.

The spelling of 140207999 in words is "one hundred forty million, two hundred seven thousand, nine hundred ninety-nine".