87444999 has 6 divisors (see below), whose sum is σ = 126309456. Its totient is φ = 58296660.

The previous prime is 87444979. The next prime is 87445003. The reversal of 87444999 is 99944478.

It is a happy number.

It is not a de Polignac number, because 87444999 - 2⁵ = 87444967 is a prime.

It is a super-2 number, since 2×87444999² = 15293255700220002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87444979) 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 in 5 ways as a sum of consecutive naturals, for example, 4858047 + ... + 4858064.

It is an arithmetic number, because the mean of its divisors is an integer number (21051576).

Almost surely, 2^87444999 is an apocalyptic number.

87444999 is a deficient number, since it is larger than the sum of its proper divisors (38864457).

87444999 is a wasteful number, since it uses less digits than its factorization.

87444999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9716117 (or 9716114 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 87444999 is about 9351.2030776794. The cubic root of 87444999 is about 443.8589611685.

The spelling of 87444999 in words is "eighty-seven million, four hundred forty-four thousand, nine hundred ninety-nine".