77565253 has 2 divisors, whose sum is σ = 77565254. Its totient is φ = 77565252.

The previous prime is 77565247. The next prime is 77565259. The reversal of 77565253 is 35256577.

It is a balanced prime because it is at equal distance from previous prime (77565247) and next prime (77565259).

It can be written as a sum of positive squares in only one way, i.e., 39150049 + 38415204 = 6257^2 + 6198^2 .

It is an emirp because it is prime and its reverse (35256577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77565253 - 2¹³ = 77557061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77565259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38782626 + 38782627.

It is an arithmetic number, because the mean of its divisors is an integer number (38782627).

Almost surely, 2^77565253 is an apocalyptic number.

It is an amenable number.

77565253 is a deficient number, since it is larger than the sum of its proper divisors (1).

77565253 is an equidigital number, since it uses as much as digits as its factorization.

77565253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 40.

The square root of 77565253 is about 8807.1137724001. The cubic root of 77565253 is about 426.4705744288.

The spelling of 77565253 in words is "seventy-seven million, five hundred sixty-five thousand, two hundred fifty-three".