163797251 has 2 divisors, whose sum is σ = 163797252. Its totient is φ = 163797250.

The previous prime is 163797239. The next prime is 163797253. The reversal of 163797251 is 152797361.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163797251 is a prime.

Together with 163797253, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 163797199 and 163797208.

It is not a weakly prime, because it can be changed into another prime (163797253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81898625 + 81898626.

It is an arithmetic number, because the mean of its divisors is an integer number (81898626).

Almost surely, 2^163797251 is an apocalyptic number.

163797251 is a deficient number, since it is larger than the sum of its proper divisors (1).

163797251 is an equidigital number, since it uses as much as digits as its factorization.

163797251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 41.

The square root of 163797251 is about 12798.3300082472. The cubic root of 163797251 is about 547.1447078061.

The spelling of 163797251 in words is "one hundred sixty-three million, seven hundred ninety-seven thousand, two hundred fifty-one".