87151729 has 4 divisors (see below), whose sum is σ = 99601984. Its totient is φ = 74701476.

The previous prime is 87151717. The next prime is 87151751. The reversal of 87151729 is 92715178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87151729 - 2⁵ = 87151697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87151691 and 87151700.

It is not an unprimeable number, because it can be changed into a prime (87151759) 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 3 ways as a sum of consecutive naturals, for example, 6225117 + ... + 6225130.

It is an arithmetic number, because the mean of its divisors is an integer number (24900496).

Almost surely, 2^87151729 is an apocalyptic number.

It is an amenable number.

87151729 is a deficient number, since it is larger than the sum of its proper divisors (12450255).

87151729 is a wasteful number, since it uses less digits than its factorization.

87151729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12450254.

The product of its digits is 35280, while the sum is 40.

The square root of 87151729 is about 9335.5090380761. The cubic root of 87151729 is about 443.3622058319.

The spelling of 87151729 in words is "eighty-seven million, one hundred fifty-one thousand, seven hundred twenty-nine".