87444433 has 4 divisors (see below), whose sum is σ = 88346020. Its totient is φ = 86542848.

The previous prime is 87444377. The next prime is 87444443. The reversal of 87444433 is 33444478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33444478 = 2 ⋅16722239.

It can be written as a sum of positive squares in 2 ways, for example, as 66210769 + 21233664 = 8137^2 + 4608^2 .

It is a cyclic number.

It is not a de Polignac number, because 87444433 - 2⁹ = 87443921 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 87444392 and 87444401.

It is not an unprimeable number, because it can be changed into a prime (87444443) 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, 450648 + ... + 450841.

It is an arithmetic number, because the mean of its divisors is an integer number (22086505).

Almost surely, 2^87444433 is an apocalyptic number.

It is an amenable number.

87444433 is a deficient number, since it is larger than the sum of its proper divisors (901587).

87444433 is an equidigital number, since it uses as much as digits as its factorization.

87444433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901586.

The product of its digits is 129024, while the sum is 37.

The square root of 87444433 is about 9351.1728141448. The cubic root of 87444433 is about 443.8580035200.

The spelling of 87444433 in words is "eighty-seven million, four hundred forty-four thousand, four hundred thirty-three".