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87023023 = 151157593
BaseRepresentation
bin1010010111111…
…01110110101111
320001202020010221
411023331312233
5134234214043
612345112211
72104453303
oct513756657
9201666127
1087023023
114513875a
1225188667
131504bc19
14b7b3d03
15798e8ed
hex52fddaf

87023023 has 4 divisors (see below), whose sum is σ = 87082128. Its totient is φ = 86963920.

The previous prime is 87023011. The next prime is 87023029. The reversal of 87023023 is 32032078.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87023023 - 29 = 87022511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87023029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27286 + ... + 30307.

It is an arithmetic number, because the mean of its divisors is an integer number (21770532).

Almost surely, 287023023 is an apocalyptic number.

87023023 is a deficient number, since it is larger than the sum of its proper divisors (59105).

87023023 is a wasteful number, since it uses less digits than its factorization.

87023023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59104.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 87023023 is about 9328.6131337943. The cubic root of 87023023 is about 443.1438453157.

The spelling of 87023023 in words is "eighty-seven million, twenty-three thousand, twenty-three".

Divisors: 1 1511 57593 87023023