78699053 has 2 divisors, whose sum is σ = 78699054. Its totient is φ = 78699052.

The previous prime is 78699043. The next prime is 78699059. The reversal of 78699053 is 35099687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51523684 + 27175369 = 7178^2 + 5213^2 .

It is a cyclic number.

It is not a de Polignac number, because 78699053 - 2⁶ = 78698989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78698989 and 78699007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78699059) 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, 39349526 + 39349527.

It is an arithmetic number, because the mean of its divisors is an integer number (39349527).

Almost surely, 2^78699053 is an apocalyptic number.

It is an amenable number.

78699053 is a deficient number, since it is larger than the sum of its proper divisors (1).

78699053 is an equidigital number, since it uses as much as digits as its factorization.

78699053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 78699053 is about 8871.2486719740. The cubic root of 78699053 is about 428.5384904792.

The spelling of 78699053 in words is "seventy-eight million, six hundred ninety-nine thousand, fifty-three".