163426261 has 4 divisors (see below), whose sum is σ = 163460800. Its totient is φ = 163391724.

The previous prime is 163426229. The next prime is 163426271. The reversal of 163426261 is 162624361.

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.

It is a cyclic number.

It is not a de Polignac number, because 163426261 - 2⁵ = 163426229 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 (163426271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8781 + ... + 20098.

It is an arithmetic number, because the mean of its divisors is an integer number (40865200).

Almost surely, 2^163426261 is an apocalyptic number.

It is an amenable number.

163426261 is a deficient number, since it is larger than the sum of its proper divisors (34539).

163426261 is an equidigital number, since it uses as much as digits as its factorization.

163426261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34538.

The product of its digits is 10368, while the sum is 31.

The square root of 163426261 is about 12783.8281042886. The cubic root of 163426261 is about 546.7313132865.

The spelling of 163426261 in words is "one hundred sixty-three million, four hundred twenty-six thousand, two hundred sixty-one".