163497961 has 8 divisors (see below), whose sum is σ = 186116544. Its totient is φ = 142171920.

The previous prime is 163497949. The next prime is 163497967. The reversal of 163497961 is 169794361.

It is a happy number.

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

It is not a de Polignac number, because 163497961 - 2⁷ = 163497833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163497967) 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, 322866 + ... + 323371.

It is an arithmetic number, because the mean of its divisors is an integer number (23264568).

Almost surely, 2^163497961 is an apocalyptic number.

163497961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163497961 is a deficient number, since it is larger than the sum of its proper divisors (22618583).

163497961 is a wasteful number, since it uses less digits than its factorization.

163497961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646271.

The product of its digits is 244944, while the sum is 46.

The square root of 163497961 is about 12786.6321210865. The cubic root of 163497961 is about 546.8112574022.

It can be divided in two parts, 16349 and 7961, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 163497961 in words is "one hundred sixty-three million, four hundred ninety-seven thousand, nine hundred sixty-one".