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87708089 = 724341627
BaseRepresentation
bin1010011101001…
…01000110111001
320010001000212202
411032211012321
5134423124324
612411515545
72113335500
oct516450671
9203030782
1087708089
1145566427
1225458bb5
131522b9a1
14b911837
157a778ae
hex53a51b9

87708089 has 12 divisors (see below), whose sum is σ = 104403024. Its totient is φ = 73428264.

The previous prime is 87708077. The next prime is 87708107. The reversal of 87708089 is 98080778.

It is not a de Polignac number, because 87708089 - 24 = 87708073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87708689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18707 + ... + 22920.

It is an arithmetic number, because the mean of its divisors is an integer number (8700252).

Almost surely, 287708089 is an apocalyptic number.

It is an amenable number.

87708089 is a deficient number, since it is larger than the sum of its proper divisors (16694935).

87708089 is a wasteful number, since it uses less digits than its factorization.

87708089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41684 (or 41677 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 87708089 is about 9365.2596867359. The cubic root of 87708089 is about 444.3036518878.

The spelling of 87708089 in words is "eighty-seven million, seven hundred eight thousand, eighty-nine".

Divisors: 1 7 43 49 301 2107 41627 291389 1789961 2039723 12529727 87708089