840296269 has 2 divisors, whose sum is σ = 840296270. Its totient is φ = 840296268.

The previous prime is 840296263. The next prime is 840296279. The reversal of 840296269 is 962692048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614395369 + 225900900 = 24787^2 + 15030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840296269 is a prime.

It is a super-2 number, since 2×840296269² = 1412195639390640722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840296263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420148134 + 420148135.

It is an arithmetic number, because the mean of its divisors is an integer number (420148135).

Almost surely, 2^840296269 is an apocalyptic number.

It is an amenable number.

840296269 is a deficient number, since it is larger than the sum of its proper divisors (1).

840296269 is an equidigital number, since it uses as much as digits as its factorization.

840296269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 840296269 is about 28987.8641676133. The cubic root of 840296269 is about 943.6497121098.

The spelling of 840296269 in words is "eight hundred forty million, two hundred ninety-six thousand, two hundred sixty-nine".