69897279871 has 2 divisors, whose sum is σ = 69897279872. Its totient is φ = 69897279870.

The previous prime is 69897279869. The next prime is 69897279919. The reversal of 69897279871 is 17897279896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69897279871 - 2¹ = 69897279869 is a prime.

Together with 69897279869, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 69897279794 and 69897279803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69897277871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34948639935 + 34948639936.

It is an arithmetic number, because the mean of its divisors is an integer number (34948639936).

Almost surely, 2^69897279871 is an apocalyptic number.

69897279871 is a deficient number, since it is larger than the sum of its proper divisors (1).

69897279871 is an equidigital number, since it uses as much as digits as its factorization.

69897279871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192036096, while the sum is 73.

The spelling of 69897279871 in words is "sixty-nine billion, eight hundred ninety-seven million, two hundred seventy-nine thousand, eight hundred seventy-one".