87813651 has 8 divisors (see below), whose sum is σ = 117137344. Its totient is φ = 58516200.

The previous prime is 87813643. The next prime is 87813689. The reversal of 87813651 is 15631878.

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

It is not a de Polignac number, because 87813651 - 2³ = 87813643 is a prime.

It is a super-3 number, since 3×87813651³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87817651) 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, 3420 + ... + 13686.

It is an arithmetic number, because the mean of its divisors is an integer number (14642168).

Almost surely, 2^87813651 is an apocalyptic number.

87813651 is a deficient number, since it is larger than the sum of its proper divisors (29323693).

87813651 is a wasteful number, since it uses less digits than its factorization.

87813651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13121.

The product of its digits is 40320, while the sum is 39.

The square root of 87813651 is about 9370.8938207622. The cubic root of 87813651 is about 444.4818292141.

The spelling of 87813651 in words is "eighty-seven million, eight hundred thirteen thousand, six hundred fifty-one".