84973639 has 2 divisors, whose sum is σ = 84973640. Its totient is φ = 84973638.

The previous prime is 84973631. The next prime is 84973673. The reversal of 84973639 is 93637948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84973639 - 2³ = 84973631 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 84973592 and 84973601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84973631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42486819 + 42486820.

It is an arithmetic number, because the mean of its divisors is an integer number (42486820).

Almost surely, 2^84973639 is an apocalyptic number.

84973639 is a deficient number, since it is larger than the sum of its proper divisors (1).

84973639 is an equidigital number, since it uses as much as digits as its factorization.

84973639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 84973639 is about 9218.1147204838. The cubic root of 84973639 is about 439.6375096429.

The spelling of 84973639 in words is "eighty-four million, nine hundred seventy-three thousand, six hundred thirty-nine".