83616861947 has 2 divisors, whose sum is σ = 83616861948. Its totient is φ = 83616861946.

The previous prime is 83616861917. The next prime is 83616861959. The reversal of 83616861947 is 74916861638.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83616861947 - 2²² = 83612667643 is a prime.

It is not a weakly prime, because it can be changed into another prime (83616861917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41808430973 + 41808430974.

It is an arithmetic number, because the mean of its divisors is an integer number (41808430974).

Almost surely, 2^83616861947 is an apocalyptic number.

83616861947 is a deficient number, since it is larger than the sum of its proper divisors (1).

83616861947 is an equidigital number, since it uses as much as digits as its factorization.

83616861947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The spelling of 83616861947 in words is "eighty-three billion, six hundred sixteen million, eight hundred sixty-one thousand, nine hundred forty-seven".