69878999987899 has 2 divisors, whose sum is σ = 69878999987900. Its totient is φ = 69878999987898.

The previous prime is 69878999987869. The next prime is 69878999987957. The reversal of 69878999987899 is 99878999987896.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69878999987899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69878999987792 and 69878999987801.

It is not a weakly prime, because it can be changed into another prime (69878999987869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34939499993949 + 34939499993950.

It is an arithmetic number, because the mean of its divisors is an integer number (34939499993950).

Almost surely, 2^{69878999987899} is an apocalyptic number.

69878999987899 is a deficient number, since it is larger than the sum of its proper divisors (1).

69878999987899 is an equidigital number, since it uses as much as digits as its factorization.

69878999987899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5759766061056, while the sum is 115.

The spelling of 69878999987899 in words is "sixty-nine trillion, eight hundred seventy-eight billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, eight hundred ninety-nine".