163889031 has 8 divisors (see below), whose sum is σ = 218634624. Its totient is φ = 109201400.

The previous prime is 163889029. The next prime is 163889051. The reversal of 163889031 is 130988361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163889031 - 2¹ = 163889029 is a prime.

It is a super-2 number, since 2×163889031² = 53719228964237922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163889051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7395 + ... + 19556.

It is an arithmetic number, because the mean of its divisors is an integer number (27329328).

Almost surely, 2^163889031 is an apocalyptic number.

163889031 is a deficient number, since it is larger than the sum of its proper divisors (54745593).

163889031 is a wasteful number, since it uses less digits than its factorization.

163889031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28981.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 163889031 is about 12801.9151301670. The cubic root of 163889031 is about 547.2468820176.

The spelling of 163889031 in words is "one hundred sixty-three million, eight hundred eighty-nine thousand, thirty-one".