84447464831 has 2 divisors, whose sum is σ = 84447464832. Its totient is φ = 84447464830.

The previous prime is 84447464821. The next prime is 84447464869. The reversal of 84447464831 is 13846474448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84447464831 - 2⁶ = 84447464767 is a prime.

It is a super-2 number, since 2×84447464831² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84447464821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42223732415 + 42223732416.

It is an arithmetic number, because the mean of its divisors is an integer number (42223732416).

Almost surely, 2^84447464831 is an apocalyptic number.

84447464831 is a deficient number, since it is larger than the sum of its proper divisors (1).

84447464831 is an equidigital number, since it uses as much as digits as its factorization.

84447464831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8257536, while the sum is 53.

The spelling of 84447464831 in words is "eighty-four billion, four hundred forty-seven million, four hundred sixty-four thousand, eight hundred thirty-one".