84727639 has 2 divisors, whose sum is σ = 84727640. Its totient is φ = 84727638.

The previous prime is 84727583. The next prime is 84727649. The reversal of 84727639 is 93672748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84727639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84727649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42363819 + 42363820.

It is an arithmetic number, because the mean of its divisors is an integer number (42363820).

Almost surely, 2^84727639 is an apocalyptic number.

84727639 is a deficient number, since it is larger than the sum of its proper divisors (1).

84727639 is an equidigital number, since it uses as much as digits as its factorization.

84727639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 84727639 is about 9204.7617568300. The cubic root of 84727639 is about 439.2128471125.

The spelling of 84727639 in words is "eighty-four million, seven hundred twenty-seven thousand, six hundred thirty-nine".