78525113 has 2 divisors, whose sum is σ = 78525114. Its totient is φ = 78525112.

The previous prime is 78525101. The next prime is 78525121. The reversal of 78525113 is 31152587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67289209 + 11235904 = 8203^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 78525113 - 2⁶ = 78525049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4588331 and since 78525113 and 4588331 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78525113.

It is not a weakly prime, because it can be changed into another prime (78525133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39262556 + 39262557.

It is an arithmetic number, because the mean of its divisors is an integer number (39262557).

Almost surely, 2^78525113 is an apocalyptic number.

It is an amenable number.

78525113 is a deficient number, since it is larger than the sum of its proper divisors (1).

78525113 is an equidigital number, since it uses as much as digits as its factorization.

78525113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 32.

The square root of 78525113 is about 8861.4396685866. The cubic root of 78525113 is about 428.2225401782. Note that the first 3 decimals are identical.

The spelling of 78525113 in words is "seventy-eight million, five hundred twenty-five thousand, one hundred thirteen".