169097971 has 16 divisors (see below), whose sum is σ = 197824000. Its totient is φ = 144482184.

The previous prime is 169097923. The next prime is 169097977. The reversal of 169097971 is 179790961.

It is a happy number.

169097971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 169097971 - 2⁹ = 169097459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169097977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150016 + ... + 151138.

It is an arithmetic number, because the mean of its divisors is an integer number (12364000).

Almost surely, 2^169097971 is an apocalyptic number.

169097971 is a deficient number, since it is larger than the sum of its proper divisors (28726029).

169097971 is an equidigital number, since it uses as much as digits as its factorization.

169097971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 49.

The square root of 169097971 is about 13003.7675694393. The cubic root of 169097971 is about 552.9842969423.

The spelling of 169097971 in words is "one hundred sixty-nine million, ninety-seven thousand, nine hundred seventy-one".