161794597 has 4 divisors (see below), whose sum is σ = 161837676. Its totient is φ = 161751520.

The previous prime is 161794583. The next prime is 161794603. The reversal of 161794597 is 795497161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 795497161 = 21323 ⋅37307.

It can be written as a sum of positive squares in 2 ways, for example, as 21585316 + 140209281 = 4646^2 + 11841^2 .

It is a cyclic number.

It is not a de Polignac number, because 161794597 - 2⁷ = 161794469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161794597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161794517) 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, 15304 + ... + 23617.

It is an arithmetic number, because the mean of its divisors is an integer number (40459419).

Almost surely, 2^161794597 is an apocalyptic number.

It is an amenable number.

161794597 is a deficient number, since it is larger than the sum of its proper divisors (43079).

161794597 is an equidigital number, since it uses as much as digits as its factorization.

161794597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43078.

The product of its digits is 476280, while the sum is 49.

The square root of 161794597 is about 12719.8505101279. The cubic root of 161794597 is about 544.9056840970.

The spelling of 161794597 in words is "one hundred sixty-one million, seven hundred ninety-four thousand, five hundred ninety-seven".