169419949 has 2 divisors, whose sum is σ = 169419950. Its totient is φ = 169419948.

The previous prime is 169419947. The next prime is 169419953. The reversal of 169419949 is 949914961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121947849 + 47472100 = 11043^2 + 6890^2 .

It is a cyclic number.

It is not a de Polignac number, because 169419949 - 2¹ = 169419947 is a prime.

Together with 169419947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 169419896 and 169419905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169419947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84709974 + 84709975.

It is an arithmetic number, because the mean of its divisors is an integer number (84709975).

Almost surely, 2^169419949 is an apocalyptic number.

It is an amenable number.

169419949 is a deficient number, since it is larger than the sum of its proper divisors (1).

169419949 is an equidigital number, since it uses as much as digits as its factorization.

169419949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 169419949 is about 13016.1418630868. The cubic root of 169419949 is about 553.3350519696.

The spelling of 169419949 in words is "one hundred sixty-nine million, four hundred nineteen thousand, nine hundred forty-nine".