87152781 has 8 divisors (see below), whose sum is σ = 116251200. Its totient is φ = 58078112.

The previous prime is 87152771. The next prime is 87152783. The reversal of 87152781 is 18725178.

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 87152781 - 2⁶ = 87152717 is a prime.

It is a super-2 number, since 2×87152781² = 15191214472067922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87152783) 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, 6136 + ... + 14558.

It is an arithmetic number, because the mean of its divisors is an integer number (14531400).

Almost surely, 2^87152781 is an apocalyptic number.

It is an amenable number.

87152781 is a deficient number, since it is larger than the sum of its proper divisors (29098419).

87152781 is a wasteful number, since it uses less digits than its factorization.

87152781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11875.

The product of its digits is 31360, while the sum is 39.

The square root of 87152781 is about 9335.5653819145. The cubic root of 87152781 is about 443.3639897520.

The spelling of 87152781 in words is "eighty-seven million, one hundred fifty-two thousand, seven hundred eighty-one".