61368241997 has 2 divisors, whose sum is σ = 61368241998. Its totient is φ = 61368241996.

The previous prime is 61368241973. The next prime is 61368241999. The reversal of 61368241997 is 79914286316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57997162276 + 3371079721 = 240826^2 + 58061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61368241997 is a prime.

It is a super-2 number, since 2×61368241997² (a number of 22 digits) contains 22 as substring.

Together with 61368241999, 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 (61368241999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30684120998 + 30684120999.

It is an arithmetic number, because the mean of its divisors is an integer number (30684120999).

Almost surely, 2^61368241997 is an apocalyptic number.

It is an amenable number.

61368241997 is a deficient number, since it is larger than the sum of its proper divisors (1).

61368241997 is an equidigital number, since it uses as much as digits as its factorization.

61368241997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The spelling of 61368241997 in words is "sixty-one billion, three hundred sixty-eight million, two hundred forty-one thousand, nine hundred ninety-seven".