140136869 has 2 divisors, whose sum is σ = 140136870. Its totient is φ = 140136868.

The previous prime is 140136851. The next prime is 140136901. The reversal of 140136869 is 968631041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137780644 + 2356225 = 11738^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 140136869 - 2²⁰ = 139088293 is a prime.

It is a super-2 number, since 2×140136869² = 39276684106246322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140136839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70068434 + 70068435.

It is an arithmetic number, because the mean of its divisors is an integer number (70068435).

Almost surely, 2^140136869 is an apocalyptic number.

It is an amenable number.

140136869 is a deficient number, since it is larger than the sum of its proper divisors (1).

140136869 is an equidigital number, since it uses as much as digits as its factorization.

140136869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 140136869 is about 11837.9419241691. The cubic root of 140136869 is about 519.4185673284.

The spelling of 140136869 in words is "one hundred forty million, one hundred thirty-six thousand, eight hundred sixty-nine".