168405071 has 6 divisors (see below), whose sum is σ = 172414440. Its totient is φ = 164486868.

The previous prime is 168405067. The next prime is 168405131. The reversal of 168405071 is 170504861.

It is a happy number.

It is not a de Polignac number, because 168405071 - 2² = 168405067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168405571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43691 + ... + 47388.

It is an arithmetic number, because the mean of its divisors is an integer number (28735740).

Almost surely, 2^168405071 is an apocalyptic number.

168405071 is a deficient number, since it is larger than the sum of its proper divisors (4009369).

168405071 is an frugal number, since it uses more digits than its factorization.

168405071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91165 (or 91122 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 168405071 is about 12977.0979421441. The cubic root of 168405071 is about 552.2279555855.

The spelling of 168405071 in words is "one hundred sixty-eight million, four hundred five thousand, seventy-one".