169970399 has 2 divisors, whose sum is σ = 169970400. Its totient is φ = 169970398.

The previous prime is 169970351. The next prime is 169970407. The reversal of 169970399 is 993079961.

169970399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (993079961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169970399 - 2¹⁶ = 169904863 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 169970399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169972399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84985199 + 84985200.

It is an arithmetic number, because the mean of its divisors is an integer number (84985200).

Almost surely, 2^169970399 is an apocalyptic number.

169970399 is a deficient number, since it is larger than the sum of its proper divisors (1).

169970399 is an equidigital number, since it uses as much as digits as its factorization.

169970399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 826686, while the sum is 53.

The square root of 169970399 is about 13037.2696144553. The cubic root of 169970399 is about 553.9336709808.

The spelling of 169970399 in words is "one hundred sixty-nine million, nine hundred seventy thousand, three hundred ninety-nine".