169846403989 has 2 divisors, whose sum is σ = 169846403990. Its totient is φ = 169846403988.

The previous prime is 169846403971. The next prime is 169846404017. The reversal of 169846403989 is 989304648961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100769423364 + 69076980625 = 317442^2 + 262825^2 .

It is a cyclic number.

It is not a de Polignac number, because 169846403989 - 2⁹ = 169846403477 is a prime.

It is a super-2 number, since 2×169846403989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169846403189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84923201994 + 84923201995.

It is an arithmetic number, because the mean of its divisors is an integer number (84923201995).

Almost surely, 2^169846403989 is an apocalyptic number.

It is an amenable number.

169846403989 is a deficient number, since it is larger than the sum of its proper divisors (1).

169846403989 is an equidigital number, since it uses as much as digits as its factorization.

169846403989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80621568, while the sum is 67.

The spelling of 169846403989 in words is "one hundred sixty-nine billion, eight hundred forty-six million, four hundred three thousand, nine hundred eighty-nine".