87444031 has 4 divisors (see below), whose sum is σ = 87611752. Its totient is φ = 87276312.

The previous prime is 87444029. The next prime is 87444041. The reversal of 87444031 is 13044478.

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 87444031 - 2¹ = 87444029 is a prime.

It is a super-3 number, since 3×87444031³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87443984 and 87444002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87444041) 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, 83076 + ... + 84121.

It is an arithmetic number, because the mean of its divisors is an integer number (21902938).

Almost surely, 2^87444031 is an apocalyptic number.

87444031 is a deficient number, since it is larger than the sum of its proper divisors (167721).

87444031 is a wasteful number, since it uses less digits than its factorization.

87444031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167720.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 87444031 is about 9351.1513194900. The cubic root of 87444031 is about 443.8573233502.

The spelling of 87444031 in words is "eighty-seven million, four hundred forty-four thousand, thirty-one".