165307399 has 2 divisors, whose sum is σ = 165307400. Its totient is φ = 165307398.

The previous prime is 165307397. The next prime is 165307451. The reversal of 165307399 is 993703561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165307399 - 2¹ = 165307397 is a prime.

Together with 165307397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165307397) 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, 82653699 + 82653700.

It is an arithmetic number, because the mean of its divisors is an integer number (82653700).

Almost surely, 2^165307399 is an apocalyptic number.

165307399 is a deficient number, since it is larger than the sum of its proper divisors (1).

165307399 is an equidigital number, since it uses as much as digits as its factorization.

165307399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 165307399 is about 12857.1925006978. The cubic root of 165307399 is about 548.8210548589.

The spelling of 165307399 in words is "one hundred sixty-five million, three hundred seven thousand, three hundred ninety-nine".