87881603 has 2 divisors, whose sum is σ = 87881604. Its totient is φ = 87881602.
The previous prime is 87881581. The next prime is 87881609. The reversal of 87881603 is 30618878.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 87881603 - 210 = 87880579 is a prime.
It is a super-2 number, since 2×878816032 = 15446352291699218, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (87881609) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43940801 + 43940802.
It is an arithmetic number, because the mean of its divisors is an integer number (43940802).
Almost surely, 287881603 is an apocalyptic number.
87881603 is a deficient number, since it is larger than the sum of its proper divisors (1).
87881603 is an equidigital number, since it uses as much as digits as its factorization.
87881603 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 64512, while the sum is 41.
The square root of 87881603 is about 9374.5188143179. The cubic root of 87881603 is about 444.5964493655.
The spelling of 87881603 in words is "eighty-seven million, eight hundred eighty-one thousand, six hundred three".
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