97878999987941 has 2 divisors, whose sum is σ = 97878999987942. Its totient is φ = 97878999987940.

The previous prime is 97878999987781. The next prime is 97878999988037. The reversal of 97878999987941 is 14978999987879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97734063690916 + 144936297025 = 9886054^2 + 380705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97878999987941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97878999927941) 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, 48939499993970 + 48939499993971.

It is an arithmetic number, because the mean of its divisors is an integer number (48939499993971).

Almost surely, 2^{97878999987941} is an apocalyptic number.

It is an amenable number.

97878999987941 is a deficient number, since it is larger than the sum of its proper divisors (1).

97878999987941 is an equidigital number, since it uses as much as digits as its factorization.

97878999987941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373318170624, while the sum is 104.

The spelling of 97878999987941 in words is "ninety-seven trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, nine hundred forty-one".