140019999 has 24 divisors (see below), whose sum is σ = 218354688. Its totient is φ = 79576560.

The previous prime is 140019967. The next prime is 140020061. The reversal of 140019999 is 999910041.

It is not a de Polignac number, because 140019999 - 2⁵ = 140019967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140019999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140019199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25584 + ... + 30570.

It is an arithmetic number, because the mean of its divisors is an integer number (9098112).

Almost surely, 2^140019999 is an apocalyptic number.

140019999 is a deficient number, since it is larger than the sum of its proper divisors (78334689).

140019999 is a wasteful number, since it uses less digits than its factorization.

140019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195 (or 5188 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 42.

The square root of 140019999 is about 11833.0046480173. The cubic root of 140019999 is about 519.2741339340.

Adding to 140019999 its sum of digits (42), we get a palindrome (140020041).

The spelling of 140019999 in words is "one hundred forty million, nineteen thousand, nine hundred ninety-nine".