65523149 has 2 divisors, whose sum is σ = 65523150. Its totient is φ = 65523148.

The previous prime is 65523137. The next prime is 65523167. The reversal of 65523149 is 94132556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60762025 + 4761124 = 7795^2 + 2182^2 .

It is a cyclic number.

It is not a de Polignac number, because 65523149 - 2²⁰ = 64474573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65523109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32761574 + 32761575.

It is an arithmetic number, because the mean of its divisors is an integer number (32761575).

Almost surely, 2^65523149 is an apocalyptic number.

It is an amenable number.

65523149 is a deficient number, since it is larger than the sum of its proper divisors (1).

65523149 is an equidigital number, since it uses as much as digits as its factorization.

65523149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 65523149 is about 8094.6370517769. The cubic root of 65523149 is about 403.1483813052.

The spelling of 65523149 in words is "sixty-five million, five hundred twenty-three thousand, one hundred forty-nine".