87320124839 has 2 divisors, whose sum is σ = 87320124840. Its totient is φ = 87320124838.

The previous prime is 87320124757. The next prime is 87320124847. The reversal of 87320124839 is 93842102378.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87320124839 - 2¹⁶ = 87320059303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87320124793 and 87320124802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87320124889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43660062419 + 43660062420.

It is an arithmetic number, because the mean of its divisors is an integer number (43660062420).

Almost surely, 2^87320124839 is an apocalyptic number.

87320124839 is a deficient number, since it is larger than the sum of its proper divisors (1).

87320124839 is an equidigital number, since it uses as much as digits as its factorization.

87320124839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 87320124839 in words is "eighty-seven billion, three hundred twenty million, one hundred twenty-four thousand, eight hundred thirty-nine".