7963581947 has 2 divisors, whose sum is σ = 7963581948. Its totient is φ = 7963581946.

The previous prime is 7963581883. The next prime is 7963581979. The reversal of 7963581947 is 7491853697.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7963581947 - 2⁶ = 7963581883 is a prime.

It is not a weakly prime, because it can be changed into another prime (7963581547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3981790973 + 3981790974.

It is an arithmetic number, because the mean of its divisors is an integer number (3981790974).

Almost surely, 2^7963581947 is an apocalyptic number.

7963581947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7963581947 is an equidigital number, since it uses as much as digits as its factorization.

7963581947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 59.

The square root of 7963581947 is about 89238.9037752033. The cubic root of 7963581947 is about 1996.9605454480.

The spelling of 7963581947 in words is "seven billion, nine hundred sixty-three million, five hundred eighty-one thousand, nine hundred forty-seven".