78057503 has 2 divisors, whose sum is σ = 78057504. Its totient is φ = 78057502.

The previous prime is 78057493. The next prime is 78057509. The reversal of 78057503 is 30575087.

It is a strong prime.

It is an emirp because it is prime and its reverse (30575087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78057503 - 2⁶ = 78057439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78057509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39028751 + 39028752.

It is an arithmetic number, because the mean of its divisors is an integer number (39028752).

Almost surely, 2^78057503 is an apocalyptic number.

78057503 is a deficient number, since it is larger than the sum of its proper divisors (1).

78057503 is an equidigital number, since it uses as much as digits as its factorization.

78057503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 78057503 is about 8835.0157328666. The cubic root of 78057503 is about 427.3708384010.

The spelling of 78057503 in words is "seventy-eight million, fifty-seven thousand, five hundred three".