165911357 has 2 divisors, whose sum is σ = 165911358. Its totient is φ = 165911356.

The previous prime is 165911321. The next prime is 165911371. The reversal of 165911357 is 753119561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88717561 + 77193796 = 9419^2 + 8786^2 .

It is a cyclic number.

It is not a de Polignac number, because 165911357 - 2¹⁰ = 165910333 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165911357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165911957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82955678 + 82955679.

It is an arithmetic number, because the mean of its divisors is an integer number (82955679).

Almost surely, 2^165911357 is an apocalyptic number.

It is an amenable number.

165911357 is a deficient number, since it is larger than the sum of its proper divisors (1).

165911357 is an equidigital number, since it uses as much as digits as its factorization.

165911357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 38.

The square root of 165911357 is about 12880.6582518131. The cubic root of 165911357 is about 549.4886233043.

The spelling of 165911357 in words is "one hundred sixty-five million, nine hundred eleven thousand, three hundred fifty-seven".