165154049 has 2 divisors, whose sum is σ = 165154050. Its totient is φ = 165154048.

The previous prime is 165153991. The next prime is 165154057. The reversal of 165154049 is 940451561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105370225 + 59783824 = 10265^2 + 7732^2 .

It is a cyclic number.

It is not a de Polignac number, because 165154049 - 2¹² = 165149953 is a prime.

It is not a weakly prime, because it can be changed into another prime (165154349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82577024 + 82577025.

It is an arithmetic number, because the mean of its divisors is an integer number (82577025).

Almost surely, 2^165154049 is an apocalyptic number.

It is an amenable number.

165154049 is a deficient number, since it is larger than the sum of its proper divisors (1).

165154049 is an equidigital number, since it uses as much as digits as its factorization.

165154049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 165154049 is about 12851.2275289172. The cubic root of 165154049 is about 548.6512948696.

The spelling of 165154049 in words is "one hundred sixty-five million, one hundred fifty-four thousand, forty-nine".