161683013 has 2 divisors, whose sum is σ = 161683014. Its totient is φ = 161683012.

The previous prime is 161683009. The next prime is 161683021. The reversal of 161683013 is 310386161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135652609 + 26030404 = 11647^2 + 5102^2 .

It is an emirp because it is prime and its reverse (310386161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161683013 - 2² = 161683009 is a prime.

It is a super-2 number, since 2×161683013² = 52282793385516338, which contains 22 as substring.

It is equal to p_9063515 and since 161683013 and 9063515 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 (161689013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80841506 + 80841507.

It is an arithmetic number, because the mean of its divisors is an integer number (80841507).

Almost surely, 2^161683013 is an apocalyptic number.

It is an amenable number.

161683013 is a deficient number, since it is larger than the sum of its proper divisors (1).

161683013 is an equidigital number, since it uses as much as digits as its factorization.

161683013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 161683013 is about 12715.4635385424. The cubic root of 161683013 is about 544.7803879083.

The spelling of 161683013 in words is "one hundred sixty-one million, six hundred eighty-three thousand, thirteen".