84953639 has 2 divisors, whose sum is σ = 84953640. Its totient is φ = 84953638.

The previous prime is 84953621. The next prime is 84953683. The reversal of 84953639 is 93635948.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84953639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84953593 and 84953602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84953699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42476819 + 42476820.

It is an arithmetic number, because the mean of its divisors is an integer number (42476820).

Almost surely, 2^84953639 is an apocalyptic number.

84953639 is a deficient number, since it is larger than the sum of its proper divisors (1).

84953639 is an equidigital number, since it uses as much as digits as its factorization.

84953639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 47.

The square root of 84953639 is about 9217.0298361240. The cubic root of 84953639 is about 439.6030148662.

The spelling of 84953639 in words is "eighty-four million, nine hundred fifty-three thousand, six hundred thirty-nine".