140213123 has 2 divisors, whose sum is σ = 140213124. Its totient is φ = 140213122.

The previous prime is 140213119. The next prime is 140213137. The reversal of 140213123 is 321312041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140213123 - 2² = 140213119 is a prime.

It is a super-2 number, since 2×140213123² = 39319439722826258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140233123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70106561 + 70106562.

It is an arithmetic number, because the mean of its divisors is an integer number (70106562).

Almost surely, 2^140213123 is an apocalyptic number.

140213123 is a deficient number, since it is larger than the sum of its proper divisors (1).

140213123 is an equidigital number, since it uses as much as digits as its factorization.

140213123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 140213123 is about 11841.1622318082. The cubic root of 140213123 is about 519.5127622914.

Adding to 140213123 its reverse (321312041), we get a palindrome (461525164).

The spelling of 140213123 in words is "one hundred forty million, two hundred thirteen thousand, one hundred twenty-three".