61996769 has 2 divisors, whose sum is σ = 61996770. Its totient is φ = 61996768.

The previous prime is 61996757. The next prime is 61996771. The reversal of 61996769 is 96769916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 16096144 = 6775^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 61996769 - 2⁸ = 61996513 is a prime.

It is a super-2 number, since 2×61996769² = 7687198732878722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 61996771, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61996769.

It is not a weakly prime, because it can be changed into another prime (61996789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30998384 + 30998385.

It is an arithmetic number, because the mean of its divisors is an integer number (30998385).

Almost surely, 2^61996769 is an apocalyptic number.

It is an amenable number.

61996769 is a deficient number, since it is larger than the sum of its proper divisors (1).

61996769 is an equidigital number, since it uses as much as digits as its factorization.

61996769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 61996769 is about 7873.8027026336. The cubic root of 61996769 is about 395.7822856079.

The spelling of 61996769 in words is "sixty-one million, nine hundred ninety-six thousand, seven hundred sixty-nine".