87442673 has 2 divisors, whose sum is σ = 87442674. Its totient is φ = 87442672.

The previous prime is 87442657. The next prime is 87442717. The reversal of 87442673 is 37624478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62362609 + 25080064 = 7897^2 + 5008^2 .

It is a cyclic number.

It is not a de Polignac number, because 87442673 - 2⁴ = 87442657 is a prime.

It is a super-2 number, since 2×87442673² = 15292442122769858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87442673.

It is not a weakly prime, because it can be changed into another prime (87442603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43721336 + 43721337.

It is an arithmetic number, because the mean of its divisors is an integer number (43721337).

Almost surely, 2^87442673 is an apocalyptic number.

It is an amenable number.

87442673 is a deficient number, since it is larger than the sum of its proper divisors (1).

87442673 is an equidigital number, since it uses as much as digits as its factorization.

87442673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 41.

The square root of 87442673 is about 9351.0787078283. The cubic root of 87442673 is about 443.8550256467.

The spelling of 87442673 in words is "eighty-seven million, four hundred forty-two thousand, six hundred seventy-three".