116642569 has 2 divisors, whose sum is σ = 116642570. Its totient is φ = 116642568.

The previous prime is 116642551. The next prime is 116642609. The reversal of 116642569 is 965246611.

It is a happy number.

It is an a-pointer prime, because the next prime (116642609) can be obtained adding 116642569 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107910544 + 8732025 = 10388^2 + 2955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116642569 is a prime.

It is a super-2 number, since 2×116642569² = 27210977805839522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (116642069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58321284 + 58321285.

It is an arithmetic number, because the mean of its divisors is an integer number (58321285).

Almost surely, 2^116642569 is an apocalyptic number.

It is an amenable number.

116642569 is a deficient number, since it is larger than the sum of its proper divisors (1).

116642569 is an equidigital number, since it uses as much as digits as its factorization.

116642569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 116642569 is about 10800.1189345303. The cubic root of 116642569 is about 488.5987580692.

The spelling of 116642569 in words is "one hundred sixteen million, six hundred forty-two thousand, five hundred sixty-nine".