161340497 has 8 divisors (see below), whose sum is σ = 163521120. Its totient is φ = 159174720.

The previous prime is 161340481. The next prime is 161340499. The reversal of 161340497 is 794043161.

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

It is a cyclic number.

It is not a de Polignac number, because 161340497 - 2⁴ = 161340481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161340499) 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, 19097 + ... + 26217.

It is an arithmetic number, because the mean of its divisors is an integer number (20440140).

Almost surely, 2^161340497 is an apocalyptic number.

It is an amenable number.

161340497 is a deficient number, since it is larger than the sum of its proper divisors (2180623).

161340497 is a wasteful number, since it uses less digits than its factorization.

161340497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7423.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 161340497 is about 12701.9879152832. The cubic root of 161340497 is about 544.3954208146.

The spelling of 161340497 in words is "one hundred sixty-one million, three hundred forty thousand, four hundred ninety-seven".