8513361947 has 2 divisors, whose sum is σ = 8513361948. Its totient is φ = 8513361946.

The previous prime is 8513361869. The next prime is 8513361959. The reversal of 8513361947 is 7491633158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8513361947 - 2²² = 8509167643 is a prime.

It is not a weakly prime, because it can be changed into another prime (8513361247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256680973 + 4256680974.

It is an arithmetic number, because the mean of its divisors is an integer number (4256680974).

Almost surely, 2^8513361947 is an apocalyptic number.

8513361947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513361947 is an equidigital number, since it uses as much as digits as its factorization.

8513361947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 8513361947 is about 92267.8814485301. The cubic root of 8513361947 is about 2041.8963804847.

The spelling of 8513361947 in words is "eight billion, five hundred thirteen million, three hundred sixty-one thousand, nine hundred forty-seven".