61983238897 has 2 divisors, whose sum is σ = 61983238898. Its totient is φ = 61983238896.

The previous prime is 61983238883. The next prime is 61983238921. The reversal of 61983238897 is 79883238916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56765921536 + 5217317361 = 238256^2 + 72231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61983238897 is a prime.

It is not a weakly prime, because it can be changed into another prime (61983238397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30991619448 + 30991619449.

It is an arithmetic number, because the mean of its divisors is an integer number (30991619449).

Almost surely, 2^61983238897 is an apocalyptic number.

It is an amenable number.

61983238897 is a deficient number, since it is larger than the sum of its proper divisors (1).

61983238897 is an equidigital number, since it uses as much as digits as its factorization.

61983238897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 64.

The spelling of 61983238897 in words is "sixty-one billion, nine hundred eighty-three million, two hundred thirty-eight thousand, eight hundred ninety-seven".