140920813 has 16 divisors (see below), whose sum is σ = 158199552. Its totient is φ = 124416000.

The previous prime is 140920757. The next prime is 140920817. The reversal of 140920813 is 318029041.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 140920813 - 2¹³ = 140912621 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 (140920817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121645 + ... + 122797.

It is an arithmetic number, because the mean of its divisors is an integer number (9887472).

Almost surely, 2^140920813 is an apocalyptic number.

It is an amenable number.

140920813 is a deficient number, since it is larger than the sum of its proper divisors (17278739).

140920813 is a wasteful number, since it uses less digits than its factorization.

140920813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 140920813 is about 11871.0072445433. The cubic root of 140920813 is about 520.3853319931.

Adding to 140920813 its reverse (318029041), we get a palindrome (458949854).

It can be divided in two parts, 1409 and 20813, that added together give a palindrome (22222).

The spelling of 140920813 in words is "one hundred forty million, nine hundred twenty thousand, eight hundred thirteen".