140068769 has 2 divisors, whose sum is σ = 140068770. Its totient is φ = 140068768.

The previous prime is 140068739. The next prime is 140068807. The reversal of 140068769 is 967860041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 238144 = 11825^2 + 488^2 .

It is an emirp because it is prime and its reverse (967860041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140068769 is a prime.

It is a super-2 number, since 2×140068769² = 39238520098350722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (140068739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70034384 + 70034385.

It is an arithmetic number, because the mean of its divisors is an integer number (70034385).

Almost surely, 2^140068769 is an apocalyptic number.

It is an amenable number.

140068769 is a deficient number, since it is larger than the sum of its proper divisors (1).

140068769 is an equidigital number, since it uses as much as digits as its factorization.

140068769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 140068769 is about 11835.0652300695. The cubic root of 140068769 is about 519.3344159412.

The spelling of 140068769 in words is "one hundred forty million, sixty-eight thousand, seven hundred sixty-nine".