163600981 has 8 divisors (see below), whose sum is σ = 169919744. Its totient is φ = 157347360.

The previous prime is 163600961. The next prime is 163600999. The reversal of 163600981 is 189006361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163600981 is a prime.

It is a super-2 number, since 2×163600981² = 53530561968324722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163600901) 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, 11136 + ... + 21241.

It is an arithmetic number, because the mean of its divisors is an integer number (21239968).

Almost surely, 2^163600981 is an apocalyptic number.

It is an amenable number.

163600981 is a deficient number, since it is larger than the sum of its proper divisors (6318763).

163600981 is a wasteful number, since it uses less digits than its factorization.

163600981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32571.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 163600981 is about 12790.6599126081. The cubic root of 163600981 is about 546.9260818070.

The spelling of 163600981 in words is "one hundred sixty-three million, six hundred thousand, nine hundred eighty-one".