161370247 has 2 divisors, whose sum is σ = 161370248. Its totient is φ = 161370246.

The previous prime is 161370233. The next prime is 161370269. The reversal of 161370247 is 742073161.

It is a weak prime.

It is an emirp because it is prime and its reverse (742073161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161370247 is a prime.

It is equal to p_9047047 and since 161370247 and 9047047 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161370217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80685123 + 80685124.

It is an arithmetic number, because the mean of its divisors is an integer number (80685124).

Almost surely, 2^161370247 is an apocalyptic number.

161370247 is a deficient number, since it is larger than the sum of its proper divisors (1).

161370247 is an equidigital number, since it uses as much as digits as its factorization.

161370247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 161370247 is about 12703.1589378390. The cubic root of 161370247 is about 544.4288795942.

The spelling of 161370247 in words is "one hundred sixty-one million, three hundred seventy thousand, two hundred forty-seven".