87812929 has 8 divisors (see below), whose sum is σ = 88668800. Its totient is φ = 86961600.

The previous prime is 87812917. The next prime is 87812953. The reversal of 87812929 is 92921878.

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 87812929 - 2¹¹ = 87810881 is a prime.

It is a super-2 number, since 2×87812929² = 15422220999118082, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87812909) 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, 47044 + ... + 48874.

It is an arithmetic number, because the mean of its divisors is an integer number (11083600).

Almost surely, 2^87812929 is an apocalyptic number.

It is an amenable number.

87812929 is a deficient number, since it is larger than the sum of its proper divisors (855871).

87812929 is a wasteful number, since it uses less digits than its factorization.

87812929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271.

The product of its digits is 145152, while the sum is 46.

The square root of 87812929 is about 9370.8552971434. The cubic root of 87812929 is about 444.4806110407.

The spelling of 87812929 in words is "eighty-seven million, eight hundred twelve thousand, nine hundred twenty-nine".