87479223239 has 2 divisors, whose sum is σ = 87479223240. Its totient is φ = 87479223238.

The previous prime is 87479223197. The next prime is 87479223301. The reversal of 87479223239 is 93232297478.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87479223239 is a prime.

It is a super-2 number, since 2×87479223239² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87479223439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43739611619 + 43739611620.

It is an arithmetic number, because the mean of its divisors is an integer number (43739611620).

Almost surely, 2^87479223239 is an apocalyptic number.

87479223239 is a deficient number, since it is larger than the sum of its proper divisors (1).

87479223239 is an equidigital number, since it uses as much as digits as its factorization.

87479223239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 56.

The spelling of 87479223239 in words is "eighty-seven billion, four hundred seventy-nine million, two hundred twenty-three thousand, two hundred thirty-nine".