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87997 = 713967
BaseRepresentation
bin10101011110111101
311110201011
4111132331
510303442
61515221
7514360
oct253675
9143634
1087997
1160128
1242b11
1331090
14240d7
151b117
hex157bd

87997 has 8 divisors (see below), whose sum is σ = 108416. Its totient is φ = 69552.

The previous prime is 87991. The next prime is 88001. The reversal of 87997 is 79978.

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

It is not a de Polignac number, because 87997 - 27 = 87869 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87991) 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, 393 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (13552).

287997 is an apocalyptic number.

It is an amenable number.

87997 is a deficient number, since it is larger than the sum of its proper divisors (20419).

87997 is a wasteful number, since it uses less digits than its factorization.

87997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987.

The product of its digits is 31752, while the sum is 40.

The square root of 87997 is about 296.6428829418. The cubic root of 87997 is about 44.4790963556.

The spelling of 87997 in words is "eighty-seven thousand, nine hundred ninety-seven".

Divisors: 1 7 13 91 967 6769 12571 87997