78500053 has 2 divisors, whose sum is σ = 78500054. Its totient is φ = 78500052.

The previous prime is 78500027. The next prime is 78500057. The reversal of 78500053 is 35000587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66618244 + 11881809 = 8162^2 + 3447^2 .

It is a cyclic number.

It is not a de Polignac number, because 78500053 - 2⁵ = 78500021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78499994 and 78500030.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78500057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39250026 + 39250027.

It is an arithmetic number, because the mean of its divisors is an integer number (39250027).

Almost surely, 2^78500053 is an apocalyptic number.

It is an amenable number.

78500053 is a deficient number, since it is larger than the sum of its proper divisors (1).

78500053 is an equidigital number, since it uses as much as digits as its factorization.

78500053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 78500053 is about 8860.0255642972. The cubic root of 78500053 is about 428.1769819348.

The spelling of 78500053 in words is "seventy-eight million, five hundred thousand, fifty-three".