77253653 has 2 divisors, whose sum is σ = 77253654. Its totient is φ = 77253652.

The previous prime is 77253611. The next prime is 77253727. The reversal of 77253653 is 35635277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76440049 + 813604 = 8743^2 + 902^2 .

It is an emirp because it is prime and its reverse (35635277) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77253653 - 2¹⁴ = 77237269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77259653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38626826 + 38626827.

It is an arithmetic number, because the mean of its divisors is an integer number (38626827).

Almost surely, 2^77253653 is an apocalyptic number.

It is an amenable number.

77253653 is a deficient number, since it is larger than the sum of its proper divisors (1).

77253653 is an equidigital number, since it uses as much as digits as its factorization.

77253653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 38.

The square root of 77253653 is about 8789.4057250761. The cubic root of 77253653 is about 425.8987265414.

The spelling of 77253653 in words is "seventy-seven million, two hundred fifty-three thousand, six hundred fifty-three".