163672057 has 4 divisors (see below), whose sum is σ = 164027556. Its totient is φ = 163316560.

The previous prime is 163672043. The next prime is 163672081. The reversal of 163672057 is 750276361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750276361 = 349 ⋅2149789.

It can be written as a sum of positive squares in 2 ways, for example, as 59305401 + 104366656 = 7701^2 + 10216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163672057 is a prime.

It is a super-2 number, since 2×163672057² = 53577084485222498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163672757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177058 + ... + 177979.

It is an arithmetic number, because the mean of its divisors is an integer number (41006889).

Almost surely, 2^163672057 is an apocalyptic number.

It is an amenable number.

163672057 is a deficient number, since it is larger than the sum of its proper divisors (355499).

163672057 is an equidigital number, since it uses as much as digits as its factorization.

163672057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355498.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 163672057 is about 12793.4380445602. The cubic root of 163672057 is about 547.0052738547.

It can be divided in two parts, 163 and 672057, that added together give a triangular number (672220 = T₁₁₅₉).

The spelling of 163672057 in words is "one hundred sixty-three million, six hundred seventy-two thousand, fifty-seven".