161348549 has 2 divisors, whose sum is σ = 161348550. Its totient is φ = 161348548.

The previous prime is 161348533. The next prime is 161348557. The reversal of 161348549 is 945843161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94926049 + 66422500 = 9743^2 + 8150^2 .

It is a cyclic number.

It is not a de Polignac number, because 161348549 - 2⁴ = 161348533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_9045896 and since 161348549 and 9045896 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 (161348569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80674274 + 80674275.

It is an arithmetic number, because the mean of its divisors is an integer number (80674275).

Almost surely, 2^161348549 is an apocalyptic number.

It is an amenable number.

161348549 is a deficient number, since it is larger than the sum of its proper divisors (1).

161348549 is an equidigital number, since it uses as much as digits as its factorization.

161348549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 161348549 is about 12702.3048695896. The cubic root of 161348549 is about 544.4044770220.

The spelling of 161348549 in words is "one hundred sixty-one million, three hundred forty-eight thousand, five hundred forty-nine".