77525257 has 2 divisors, whose sum is σ = 77525258. Its totient is φ = 77525256.

The previous prime is 77525221. The next prime is 77525293. The reversal of 77525257 is 75252577.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (77525221) and next prime (77525293).

It can be written as a sum of positive squares in only one way, i.e., 59043856 + 18481401 = 7684^2 + 4299^2 .

It is a cyclic number.

It is not a de Polignac number, because 77525257 - 2¹¹ = 77523209 is a prime.

It is not a weakly prime, because it can be changed into another prime (77525297) 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, 38762628 + 38762629.

It is an arithmetic number, because the mean of its divisors is an integer number (38762629).

Almost surely, 2^77525257 is an apocalyptic number.

It is an amenable number.

77525257 is a deficient number, since it is larger than the sum of its proper divisors (1).

77525257 is an equidigital number, since it uses as much as digits as its factorization.

77525257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171500, while the sum is 40.

The square root of 77525257 is about 8804.8428151785. The cubic root of 77525257 is about 426.3972596000.

The spelling of 77525257 in words is "seventy-seven million, five hundred twenty-five thousand, two hundred fifty-seven".