163872769 has 4 divisors (see below), whose sum is σ = 170997696. Its totient is φ = 156747844.

The previous prime is 163872743. The next prime is 163872773. The reversal of 163872769 is 967278361.

It is a happy number.

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 163872769 - 2¹⁹ = 163348481 is a prime.

It is a super-2 number, since 2×163872769² = 53708568839454722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163572769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3562429 + ... + 3562474.

It is an arithmetic number, because the mean of its divisors is an integer number (42749424).

It is a Proth number, since it is equal to 5001 ⋅ 2¹⁵ + 1 and 5001 < 2¹⁵.

Almost surely, 2^163872769 is an apocalyptic number.

It is an amenable number.

163872769 is a deficient number, since it is larger than the sum of its proper divisors (7124927).

163872769 is an equidigital number, since it uses as much as digits as its factorization.

163872769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124926.

The product of its digits is 762048, while the sum is 49.

The square root of 163872769 is about 12801.2799750650. The cubic root of 163872769 is about 547.2287811048.

The spelling of 163872769 in words is "one hundred sixty-three million, eight hundred seventy-two thousand, seven hundred sixty-nine".