165453749 has 2 divisors, whose sum is σ = 165453750. Its totient is φ = 165453748.

The previous prime is 165453733. The next prime is 165453763. The reversal of 165453749 is 947354561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163072900 + 2380849 = 12770^2 + 1543^2 .

It is a cyclic number.

It is not a de Polignac number, because 165453749 - 2⁴ = 165453733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165453709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82726874 + 82726875.

It is an arithmetic number, because the mean of its divisors is an integer number (82726875).

Almost surely, 2^165453749 is an apocalyptic number.

It is an amenable number.

165453749 is a deficient number, since it is larger than the sum of its proper divisors (1).

165453749 is an equidigital number, since it uses as much as digits as its factorization.

165453749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 165453749 is about 12862.8826084980. The cubic root of 165453749 is about 548.9829678979.

The spelling of 165453749 in words is "one hundred sixty-five million, four hundred fifty-three thousand, seven hundred forty-nine".