161693298 has 24 divisors (see below), whose sum is σ = 377284908. Its totient is φ = 49751712.

The previous prime is 161693297. The next prime is 161693317. The reversal of 161693298 is 892396161.

It is a happy number.

161693298 is a `hidden beast` number, since 1 + 616 + 9 + 3 + 29 + 8 = 666.

161693298 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 116575209 + 45118089 = 10797^2 + 6717^2 .

It is a super-2 number, since 2×161693298² = 52289445236233608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161693297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345265 + ... + 345732.

Almost surely, 2^161693298 is an apocalyptic number.

161693298 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161693298 is an abundant number, since it is smaller than the sum of its proper divisors (215591610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161693298 is a wasteful number, since it uses less digits than its factorization.

161693298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691018 (or 691015 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 161693298 is about 12715.8679609376. The cubic root of 161693298 is about 544.7919392094.

The spelling of 161693298 in words is "one hundred sixty-one million, six hundred ninety-three thousand, two hundred ninety-eight".