87442224449 has 2 divisors, whose sum is σ = 87442224450. Its totient is φ = 87442224448.

The previous prime is 87442224439. The next prime is 87442224547. The reversal of 87442224449 is 94442224478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47838438400 + 39603786049 = 218720^2 + 199007^2 .

It is a cyclic number.

It is not a de Polignac number, because 87442224449 - 2⁴ = 87442224433 is a prime.

It is a super-2 number, since 2×87442224449² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87442224397 and 87442224406.

It is not a weakly prime, because it can be changed into another prime (87442224439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43721112224 + 43721112225.

It is an arithmetic number, because the mean of its divisors is an integer number (43721112225).

Almost surely, 2^87442224449 is an apocalyptic number.

It is an amenable number.

87442224449 is a deficient number, since it is larger than the sum of its proper divisors (1).

87442224449 is an equidigital number, since it uses as much as digits as its factorization.

87442224449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4128768, while the sum is 50.

The spelling of 87442224449 in words is "eighty-seven billion, four hundred forty-two million, two hundred twenty-four thousand, four hundred forty-nine".