169419947 has 2 divisors, whose sum is σ = 169419948. Its totient is φ = 169419946.

The previous prime is 169419923. The next prime is 169419949. The reversal of 169419947 is 749914961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169419947 is a prime.

Together with 169419949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 169419895 and 169419904.

It is not a weakly prime, because it can be changed into another prime (169419949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84709973 + 84709974.

It is an arithmetic number, because the mean of its divisors is an integer number (84709974).

Almost surely, 2^169419947 is an apocalyptic number.

169419947 is a deficient number, since it is larger than the sum of its proper divisors (1).

169419947 is an equidigital number, since it uses as much as digits as its factorization.

169419947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 169419947 is about 13016.1417862591. The cubic root of 169419947 is about 553.3350497923.

The spelling of 169419947 in words is "one hundred sixty-nine million, four hundred nineteen thousand, nine hundred forty-seven".