140731111 has 2 divisors, whose sum is σ = 140731112. Its totient is φ = 140731110.

The previous prime is 140731057. The next prime is 140731139. The reversal of 140731111 is 111137041.

It is a happy number.

140731111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140731111 - 2²¹ = 138633959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140731211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70365555 + 70365556.

It is an arithmetic number, because the mean of its divisors is an integer number (70365556).

Almost surely, 2^140731111 is an apocalyptic number.

140731111 is a deficient number, since it is larger than the sum of its proper divisors (1).

140731111 is an equidigital number, since it uses as much as digits as its factorization.

140731111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 140731111 is about 11863.0144145575. The cubic root of 140731111 is about 520.1517197818.

Adding to 140731111 its reverse (111137041), we get a palindrome (251868152).

The spelling of 140731111 in words is "one hundred forty million, seven hundred thirty-one thousand, one hundred eleven".