77823953 has 2 divisors, whose sum is σ = 77823954. Its totient is φ = 77823952.

The previous prime is 77823947. The next prime is 77823959. The reversal of 77823953 is 35932877.

It is a balanced prime because it is at equal distance from previous prime (77823947) and next prime (77823959).

It can be written as a sum of positive squares in only one way, i.e., 57501889 + 20322064 = 7583^2 + 4508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77823953 is a prime.

It is not a weakly prime, because it can be changed into another prime (77823959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38911976 + 38911977.

It is an arithmetic number, because the mean of its divisors is an integer number (38911977).

Almost surely, 2^77823953 is an apocalyptic number.

It is an amenable number.

77823953 is a deficient number, since it is larger than the sum of its proper divisors (1).

77823953 is an equidigital number, since it uses as much as digits as its factorization.

77823953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 77823953 is about 8821.7885374792. The cubic root of 77823953 is about 426.9441778478.

The spelling of 77823953 in words is "seventy-seven million, eight hundred twenty-three thousand, nine hundred fifty-three".