84957643 has 2 divisors, whose sum is σ = 84957644. Its totient is φ = 84957642.

The previous prime is 84957611. The next prime is 84957647. The reversal of 84957643 is 34675948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84957643 - 2⁵ = 84957611 is a prime.

It is a super-2 number, since 2×84957643² = 14435602208230898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84957593 and 84957602.

It is not a weakly prime, because it can be changed into another prime (84957647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42478821 + 42478822.

It is an arithmetic number, because the mean of its divisors is an integer number (42478822).

Almost surely, 2^84957643 is an apocalyptic number.

84957643 is a deficient number, since it is larger than the sum of its proper divisors (1).

84957643 is an equidigital number, since it uses as much as digits as its factorization.

84957643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The square root of 84957643 is about 9217.2470401959. The cubic root of 84957643 is about 439.6099211539.

The spelling of 84957643 in words is "eighty-four million, nine hundred fifty-seven thousand, six hundred forty-three".