78057893 has 2 divisors, whose sum is σ = 78057894. Its totient is φ = 78057892.

The previous prime is 78057887. The next prime is 78057899. The reversal of 78057893 is 39875087.

It is a balanced prime because it is at equal distance from previous prime (78057887) and next prime (78057899).

It can be written as a sum of positive squares in only one way, i.e., 72216004 + 5841889 = 8498^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 78057893 - 2⁴ = 78057877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78057899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39028946 + 39028947.

It is an arithmetic number, because the mean of its divisors is an integer number (39028947).

Almost surely, 2^78057893 is an apocalyptic number.

It is an amenable number.

78057893 is a deficient number, since it is larger than the sum of its proper divisors (1).

78057893 is an equidigital number, since it uses as much as digits as its factorization.

78057893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 78057893 is about 8835.0378041070. The cubic root of 78057893 is about 427.3715501598.

The spelling of 78057893 in words is "seventy-eight million, fifty-seven thousand, eight hundred ninety-three".