78573487 has 2 divisors, whose sum is σ = 78573488. Its totient is φ = 78573486.

The previous prime is 78573461. The next prime is 78573529. The reversal of 78573487 is 78437587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78573487 - 2¹¹ = 78571439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78573487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78573457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39286743 + 39286744.

It is an arithmetic number, because the mean of its divisors is an integer number (39286744).

Almost surely, 2^78573487 is an apocalyptic number.

78573487 is a deficient number, since it is larger than the sum of its proper divisors (1).

78573487 is an equidigital number, since it uses as much as digits as its factorization.

78573487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 49.

The square root of 78573487 is about 8864.1687145496. The cubic root of 78573487 is about 428.3104550891.

The spelling of 78573487 in words is "seventy-eight million, five hundred seventy-three thousand, four hundred eighty-seven".