163620245 has 4 divisors (see below), whose sum is σ = 196344300. Its totient is φ = 130896192.

The previous prime is 163620241. The next prime is 163620269. The reversal of 163620245 is 542026361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542026361 = 419 ⋅1293619.

It can be written as a sum of positive squares in 2 ways, for example, as 27804529 + 135815716 = 5273^2 + 11654^2 .

It is a cyclic number.

It is not a de Polignac number, because 163620245 - 2² = 163620241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163620241) 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, 16362020 + ... + 16362029.

It is an arithmetic number, because the mean of its divisors is an integer number (49086075).

Almost surely, 2^163620245 is an apocalyptic number.

It is an amenable number.

163620245 is a deficient number, since it is larger than the sum of its proper divisors (32724055).

163620245 is an equidigital number, since it uses as much as digits as its factorization.

163620245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32724054.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 163620245 is about 12791.4129399375. The cubic root of 163620245 is about 546.9475477959.

The spelling of 163620245 in words is "one hundred sixty-three million, six hundred twenty thousand, two hundred forty-five".