142181023969 has 2 divisors, whose sum is σ = 142181023970. Its totient is φ = 142181023968.

The previous prime is 142181023967. The next prime is 142181024003. The reversal of 142181023969 is 969320181241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120509651025 + 21671372944 = 347145^2 + 147212^2 .

It is an emirp because it is prime and its reverse (969320181241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142181023969 - 2¹ = 142181023967 is a prime.

It is a super-2 number, since 2×142181023969² (a number of 23 digits) contains 22 as substring.

Together with 142181023967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142181023967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71090511984 + 71090511985.

It is an arithmetic number, because the mean of its divisors is an integer number (71090511985).

Almost surely, 2^142181023969 is an apocalyptic number.

It is an amenable number.

142181023969 is a deficient number, since it is larger than the sum of its proper divisors (1).

142181023969 is an equidigital number, since it uses as much as digits as its factorization.

142181023969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 142181023969 in words is "one hundred forty-two billion, one hundred eighty-one million, twenty-three thousand, nine hundred sixty-nine".