87621567 has 8 divisors (see below), whose sum is σ = 127449600. Its totient is φ = 53103960.

The previous prime is 87621563. The next prime is 87621571. The reversal of 87621567 is 76512678.

It is an interprime number because it is at equal distance from previous prime (87621563) and next prime (87621571).

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

It is not a de Polignac number, because 87621567 - 2² = 87621563 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87621563) 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, 1327567 + ... + 1327632.

It is an arithmetic number, because the mean of its divisors is an integer number (15931200).

Almost surely, 2^87621567 is an apocalyptic number.

87621567 is a deficient number, since it is larger than the sum of its proper divisors (39828033).

87621567 is a wasteful number, since it uses less digits than its factorization.

87621567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655213.

The product of its digits is 141120, while the sum is 42.

The square root of 87621567 is about 9360.6392409920. The cubic root of 87621567 is about 444.1575053971.

Subtracting from 87621567 its reverse (76512678), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 87621 and 567, that added together give a palindrome (88188).

The spelling of 87621567 in words is "eighty-seven million, six hundred twenty-one thousand, five hundred sixty-seven".