87891273 has 12 divisors (see below), whose sum is σ = 128484720. Its totient is φ = 57887736.

The previous prime is 87891263. The next prime is 87891277. The reversal of 87891273 is 37219878.

It is not a de Polignac number, because 87891273 - 2¹⁰ = 87890249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87891277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58083 + ... + 59576.

It is an arithmetic number, because the mean of its divisors is an integer number (10707060).

Almost surely, 2^87891273 is an apocalyptic number.

87891273 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

87891273 is a deficient number, since it is larger than the sum of its proper divisors (40593447).

87891273 is a wasteful number, since it uses less digits than its factorization.

87891273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117748 (or 117745 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 87891273 is about 9375.0345599363. The cubic root of 87891273 is about 444.6127557362.

The spelling of 87891273 in words is "eighty-seven million, eight hundred ninety-one thousand, two hundred seventy-three".