87444907 has 4 divisors (see below), whose sum is σ = 95394456. Its totient is φ = 79495360.

The previous prime is 87444871. The next prime is 87444913. The reversal of 87444907 is 70944478.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87444907 - 2¹⁵ = 87412139 is a prime.

It is a super-2 number, since 2×87444907² = 15293223520477298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87444967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3974758 + ... + 3974779.

It is an arithmetic number, because the mean of its divisors is an integer number (23848614).

Almost surely, 2^87444907 is an apocalyptic number.

87444907 is a deficient number, since it is larger than the sum of its proper divisors (7949549).

87444907 is a wasteful number, since it uses less digits than its factorization.

87444907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7949548.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 87444907 is about 9351.1981585249. The cubic root of 87444907 is about 443.8588055086.

The spelling of 87444907 in words is "eighty-seven million, four hundred forty-four thousand, nine hundred seven".