87123493 has 8 divisors (see below), whose sum is σ = 94188320. Its totient is φ = 80306640.

The previous prime is 87123479. The next prime is 87123499. The reversal of 87123493 is 39432178.

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

It is a cyclic number.

It is not a de Polignac number, because 87123493 - 2²¹ = 85026341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87123499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61263 + ... + 62668.

It is an arithmetic number, because the mean of its divisors is an integer number (11773540).

Almost surely, 2^87123493 is an apocalyptic number.

It is an amenable number.

87123493 is a deficient number, since it is larger than the sum of its proper divisors (7064827).

87123493 is a wasteful number, since it uses less digits than its factorization.

87123493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123987.

The product of its digits is 36288, while the sum is 37.

The square root of 87123493 is about 9333.9966252404. The cubic root of 87123493 is about 443.3143195092.

It can be divided in two parts, 87123 and 493, that added together give a square (87616 = 296²).

The spelling of 87123493 in words is "eighty-seven million, one hundred twenty-three thousand, four hundred ninety-three".