161202439 has 2 divisors, whose sum is σ = 161202440. Its totient is φ = 161202438.

The previous prime is 161202427. The next prime is 161202467. The reversal of 161202439 is 934202161.

It is an a-pointer prime, because the next prime (161202467) can be obtained adding 161202439 to its sum of digits (28).

It is a weak prime.

It is an emirp because it is prime and its reverse (934202161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161202439 - 2¹⁷ = 161071367 is a prime.

161202439 is a modest number, since divided by 2439 gives 1612 as remainder.

It is equal to p_9038251 and since 161202439 and 9038251 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 (161202409) 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, 80601219 + 80601220.

It is an arithmetic number, because the mean of its divisors is an integer number (80601220).

Almost surely, 2^161202439 is an apocalyptic number.

161202439 is a deficient number, since it is larger than the sum of its proper divisors (1).

161202439 is an equidigital number, since it uses as much as digits as its factorization.

161202439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 161202439 is about 12696.5522485437. The cubic root of 161202439 is about 544.2400979786.

The spelling of 161202439 in words is "one hundred sixty-one million, two hundred two thousand, four hundred thirty-nine".