163470091 has 4 divisors (see below), whose sum is σ = 172073800. Its totient is φ = 154866384.

The previous prime is 163470029. The next prime is 163470137. The reversal of 163470091 is 190074361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190074361 = 31 ⋅6131431.

It is a cyclic number.

It is not a de Polignac number, because 163470091 - 2¹⁹ = 162945803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163470001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4301826 + ... + 4301863.

It is an arithmetic number, because the mean of its divisors is an integer number (43018450).

Almost surely, 2^163470091 is an apocalyptic number.

163470091 is a deficient number, since it is larger than the sum of its proper divisors (8603709).

163470091 is an equidigital number, since it uses as much as digits as its factorization.

163470091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8603708.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 163470091 is about 12785.5422646050. The cubic root of 163470091 is about 546.7801856676.

The spelling of 163470091 in words is "one hundred sixty-three million, four hundred seventy thousand, ninety-one".