163161953 has 4 divisors (see below), whose sum is σ = 164335920. Its totient is φ = 161987988.

The previous prime is 163161913. The next prime is 163161967. The reversal of 163161953 is 359161361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 359161361 = 13 ⋅27627797.

It is a cyclic number.

It is not a de Polignac number, because 163161953 - 2⁸ = 163161697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163161913) 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, 586775 + ... + 587052.

It is an arithmetic number, because the mean of its divisors is an integer number (41083980).

Almost surely, 2^163161953 is an apocalyptic number.

It is an amenable number.

163161953 is a deficient number, since it is larger than the sum of its proper divisors (1173967).

163161953 is a wasteful number, since it uses less digits than its factorization.

163161953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173966.

The product of its digits is 14580, while the sum is 35.

The square root of 163161953 is about 12773.4863291116. The cubic root of 163161953 is about 546.4364128389.

The spelling of 163161953 in words is "one hundred sixty-three million, one hundred sixty-one thousand, nine hundred fifty-three".