161502899 has 2 divisors, whose sum is σ = 161502900. Its totient is φ = 161502898.

The previous prime is 161502881. The next prime is 161502947. The reversal of 161502899 is 998205161.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (998205161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161502899 is a prime.

It is not a weakly prime, because it can be changed into another prime (161502829) 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, 80751449 + 80751450.

It is an arithmetic number, because the mean of its divisors is an integer number (80751450).

Almost surely, 2^161502899 is an apocalyptic number.

161502899 is a deficient number, since it is larger than the sum of its proper divisors (1).

161502899 is an equidigital number, since it uses as much as digits as its factorization.

161502899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 161502899 is about 12708.3790862564. The cubic root of 161502899 is about 544.5780186106.

The spelling of 161502899 in words is "one hundred sixty-one million, five hundred two thousand, eight hundred ninety-nine".