997161481 has 8 divisors (see below), whose sum is σ = 1043913024. Its totient is φ = 950693040.

The previous prime is 997161467. The next prime is 997161499. The reversal of 997161481 is 184161799.

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

It is not a de Polignac number, because 997161481 - 2²⁹ = 460290569 is a prime.

It is a super-2 number, since 2×997161481² = 1988662038380226722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997161421) 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, 63550 + ... + 77671.

It is an arithmetic number, because the mean of its divisors is an integer number (130489128).

Almost surely, 2^997161481 is an apocalyptic number.

It is an amenable number.

997161481 is a deficient number, since it is larger than the sum of its proper divisors (46751543).

997161481 is a wasteful number, since it uses less digits than its factorization.

997161481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141551.

The product of its digits is 108864, while the sum is 46.

The square root of 997161481 is about 31577.8637814530. The cubic root of 997161481 is about 999.0529303422.

The spelling of 997161481 in words is "nine hundred ninety-seven million, one hundred sixty-one thousand, four hundred eighty-one".