61983087197 has 2 divisors, whose sum is σ = 61983087198. Its totient is φ = 61983087196.

The previous prime is 61983087121. The next prime is 61983087211. The reversal of 61983087197 is 79178038916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47528796121 + 14454291076 = 218011^2 + 120226^2 .

It is a cyclic number.

It is not a de Polignac number, because 61983087197 - 2⁸ = 61983086941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61983077197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30991543598 + 30991543599.

It is an arithmetic number, because the mean of its divisors is an integer number (30991543599).

Almost surely, 2^61983087197 is an apocalyptic number.

It is an amenable number.

61983087197 is a deficient number, since it is larger than the sum of its proper divisors (1).

61983087197 is an equidigital number, since it uses as much as digits as its factorization.

61983087197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 61983087197 in words is "sixty-one billion, nine hundred eighty-three million, eighty-seven thousand, one hundred ninety-seven".