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87553 is a prime number
BaseRepresentation
bin10101011000000001
311110002201
4111120001
510300203
61513201
7513154
oct253001
9143081
1087553
115a864
1242801
1330b0b
1423c9b
151ae1d
hex15601

87553 has 2 divisors, whose sum is σ = 87554. Its totient is φ = 87552.

The previous prime is 87547. The next prime is 87557. The reversal of 87553 is 35578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82369 + 5184 = 287^2 + 72^2 .

It is a cyclic number.

It is not a de Polignac number, because 87553 - 29 = 87041 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (87557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43776 + 43777.

It is an arithmetic number, because the mean of its divisors is an integer number (43777).

It is a Proth number, since it is equal to 171 ⋅ 29 + 1 and 171 < 29.

287553 is an apocalyptic number.

It is an amenable number.

87553 is a deficient number, since it is larger than the sum of its proper divisors (1).

87553 is an equidigital number, since it uses as much as digits as its factorization.

87553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 87553 is about 295.8935619442. The cubic root of 87553 is about 44.4041618802.

The spelling of 87553 in words is "eighty-seven thousand, five hundred fifty-three".