169944449923 has 2 divisors, whose sum is σ = 169944449924. Its totient is φ = 169944449922.

The previous prime is 169944449891. The next prime is 169944449947. The reversal of 169944449923 is 329944449961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 169944449923 - 2⁵ = 169944449891 is a prime.

It is a super-2 number, since 2×169944449923² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (169984449923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84972224961 + 84972224962.

It is an arithmetic number, because the mean of its divisors is an integer number (84972224962).

Almost surely, 2^169944449923 is an apocalyptic number.

169944449923 is a deficient number, since it is larger than the sum of its proper divisors (1).

169944449923 is an equidigital number, since it uses as much as digits as its factorization.

169944449923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60466176, while the sum is 64.

The spelling of 169944449923 in words is "one hundred sixty-nine billion, nine hundred forty-four million, four hundred forty-nine thousand, nine hundred twenty-three".