61996771 has 2 divisors, whose sum is σ = 61996772. Its totient is φ = 61996770.

The previous prime is 61996769. The next prime is 61996789. The reversal of 61996771 is 17769916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61996771 - 2¹ = 61996769 is a prime.

It is a super-3 number, since 3×61996771³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 61996769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61996741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30998385 + 30998386.

It is an arithmetic number, because the mean of its divisors is an integer number (30998386).

Almost surely, 2^61996771 is an apocalyptic number.

61996771 is a deficient number, since it is larger than the sum of its proper divisors (1).

61996771 is an equidigital number, since it uses as much as digits as its factorization.

61996771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 46.

The square root of 61996771 is about 7873.8028296370. The cubic root of 61996771 is about 395.7822898638.

The spelling of 61996771 in words is "sixty-one million, nine hundred ninety-six thousand, seven hundred seventy-one".