8478709487 has 2 divisors, whose sum is σ = 8478709488. Its totient is φ = 8478709486.

The previous prime is 8478709429. The next prime is 8478709493. The reversal of 8478709487 is 7849078748.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8478709487 - 2⁶ = 8478709423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8478706487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239354743 + 4239354744.

It is an arithmetic number, because the mean of its divisors is an integer number (4239354744).

Almost surely, 2^8478709487 is an apocalyptic number.

8478709487 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478709487 is an equidigital number, since it uses as much as digits as its factorization.

8478709487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25288704, while the sum is 62.

The square root of 8478709487 is about 92079.9081613356. The cubic root of 8478709487 is about 2039.1221943447.

The spelling of 8478709487 in words is "eight billion, four hundred seventy-eight million, seven hundred nine thousand, four hundred eighty-seven".