61065869 has 2 divisors, whose sum is σ = 61065870. Its totient is φ = 61065868.

The previous prime is 61065857. The next prime is 61065871. The reversal of 61065869 is 96856016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39564100 + 21501769 = 6290^2 + 4637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61065869 is a prime.

It is a super-2 number, since 2×61065869² = 7458080713450322, which contains 22 as substring.

Together with 61065871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61065269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30532934 + 30532935.

It is an arithmetic number, because the mean of its divisors is an integer number (30532935).

Almost surely, 2^61065869 is an apocalyptic number.

It is an amenable number.

61065869 is a deficient number, since it is larger than the sum of its proper divisors (1).

61065869 is an equidigital number, since it uses as much as digits as its factorization.

61065869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 61065869 is about 7814.4653687888. The cubic root of 61065869 is about 393.7913575774.

The spelling of 61065869 in words is "sixty-one million, sixty-five thousand, eight hundred sixty-nine".