87381273 has 8 divisors (see below), whose sum is σ = 133152448. Its totient is φ = 49932144.

The previous prime is 87381253. The next prime is 87381293. The reversal of 87381273 is 37218378.

It is an interprime number because it is at equal distance from previous prime (87381253) and next prime (87381293).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87381273 - 2⁸ = 87381017 is a prime.

It is a super-2 number, since 2×87381273² = 15270973742201058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87381223) 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 7 ways as a sum of consecutive naturals, for example, 2080486 + ... + 2080527.

It is an arithmetic number, because the mean of its divisors is an integer number (16644056).

Almost surely, 2^87381273 is an apocalyptic number.

It is an amenable number.

87381273 is a deficient number, since it is larger than the sum of its proper divisors (45771175).

87381273 is a wasteful number, since it uses less digits than its factorization.

87381273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161023.

The product of its digits is 56448, while the sum is 39.

The square root of 87381273 is about 9347.7950876129. The cubic root of 87381273 is about 443.7511134535.

It can be divided in two parts, 8738 and 1273, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 87381273 in words is "eighty-seven million, three hundred eighty-one thousand, two hundred seventy-three".