140979823 has 2 divisors, whose sum is σ = 140979824. Its totient is φ = 140979822.

The previous prime is 140979799. The next prime is 140979833. The reversal of 140979823 is 328979041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140979823 - 2¹³ = 140971631 is a prime.

It is a super-2 number, since 2×140979823² = 39750620986222658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 140979823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140979833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70489911 + 70489912.

It is an arithmetic number, because the mean of its divisors is an integer number (70489912).

Almost surely, 2^140979823 is an apocalyptic number.

140979823 is a deficient number, since it is larger than the sum of its proper divisors (1).

140979823 is an equidigital number, since it uses as much as digits as its factorization.

140979823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 140979823 is about 11873.4924516757. The cubic root of 140979823 is about 520.4579582492.

It can be divided in two parts, 14097 and 9823, that multiplied together give a palindrome (138474831).

The spelling of 140979823 in words is "one hundred forty million, nine hundred seventy-nine thousand, eight hundred twenty-three".