140731823 has 2 divisors, whose sum is σ = 140731824. Its totient is φ = 140731822.

The previous prime is 140731793. The next prime is 140731837. The reversal of 140731823 is 328137041.

It is a strong prime.

It is an emirp because it is prime and its reverse (328137041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140731823 - 2⁸ = 140731567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140737823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70365911 + 70365912.

It is an arithmetic number, because the mean of its divisors is an integer number (70365912).

Almost surely, 2^140731823 is an apocalyptic number.

140731823 is a deficient number, since it is larger than the sum of its proper divisors (1).

140731823 is an equidigital number, since it uses as much as digits as its factorization.

140731823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 140731823 is about 11863.0444237556. The cubic root of 140731823 is about 520.1525969804.

Adding to 140731823 its reverse (328137041), we get a palindrome (468868864).

The spelling of 140731823 in words is "one hundred forty million, seven hundred thirty-one thousand, eight hundred twenty-three".