163940997 has 8 divisors (see below), whose sum is σ = 238459680. Its totient is φ = 99358160.

The previous prime is 163940993. The next prime is 163941023. The reversal of 163940997 is 799049361.

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

It is not a de Polignac number, because 163940997 - 2² = 163940993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163940993) 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, 2483922 + ... + 2483987.

It is an arithmetic number, because the mean of its divisors is an integer number (29807460).

Almost surely, 2^163940997 is an apocalyptic number.

It is an amenable number.

163940997 is a deficient number, since it is larger than the sum of its proper divisors (74518683).

163940997 is a wasteful number, since it uses less digits than its factorization.

163940997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967923.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 163940997 is about 12803.9445875090. The cubic root of 163940997 is about 547.3047163259.

The spelling of 163940997 in words is "one hundred sixty-three million, nine hundred forty thousand, nine hundred ninety-seven".