997156163 has 4 divisors (see below), whose sum is σ = 1011200688. Its totient is φ = 983111640.

The previous prime is 997156123. The next prime is 997156211. The reversal of 997156163 is 361651799.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 997156163 - 2¹² = 997152067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997156103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7022156 + ... + 7022297.

It is an arithmetic number, because the mean of its divisors is an integer number (252800172).

Almost surely, 2^997156163 is an apocalyptic number.

997156163 is a deficient number, since it is larger than the sum of its proper divisors (14044525).

997156163 is a wasteful number, since it uses less digits than its factorization.

997156163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14044524.

The product of its digits is 306180, while the sum is 47.

The square root of 997156163 is about 31577.7795767847. The cubic root of 997156163 is about 999.0511543099.

The spelling of 997156163 in words is "nine hundred ninety-seven million, one hundred fifty-six thousand, one hundred sixty-three".