77859253 has 2 divisors, whose sum is σ = 77859254. Its totient is φ = 77859252.

The previous prime is 77859233. The next prime is 77859263. The reversal of 77859253 is 35295877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77845329 + 13924 = 8823^2 + 118^2 .

It is an emirp because it is prime and its reverse (35295877) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77859253 is a prime.

It is a super-4 number, since 4×77859253⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77859203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38929626 + 38929627.

It is an arithmetic number, because the mean of its divisors is an integer number (38929627).

Almost surely, 2^77859253 is an apocalyptic number.

It is an amenable number.

77859253 is a deficient number, since it is larger than the sum of its proper divisors (1).

77859253 is an equidigital number, since it uses as much as digits as its factorization.

77859253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 77859253 is about 8823.7890387293. The cubic root of 77859253 is about 427.0087203217.

It can be divided in two parts, 778 and 59253, that added together give a triangular number (60031 = T₃₄₆).

The spelling of 77859253 in words is "seventy-seven million, eight hundred fifty-nine thousand, two hundred fifty-three".