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89898987 = 340174729
BaseRepresentation
bin1010101101110…
…11111111101011
320021011100020010
411112323333223
5141003231422
612530503003
72141062113
oct526737753
9207140203
1089898987
1146822492
1226134a63
1315817c89
14bd22043
157d5bb0c
hex55bbfeb

89898987 has 8 divisors (see below), whose sum is σ = 120165840. Its totient is φ = 59782400.

The previous prime is 89898983. The next prime is 89898997. The reversal of 89898987 is 78989898.

89898987 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is a cyclic number.

It is not a de Polignac number, because 89898987 - 22 = 89898983 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (89898983) 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, 36162 + ... + 38567.

It is an arithmetic number, because the mean of its divisors is an integer number (15020730).

Almost surely, 289898987 is an apocalyptic number.

89898987 is a deficient number, since it is larger than the sum of its proper divisors (30266853).

89898987 is a wasteful number, since it uses less digits than its factorization.

89898987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75133.

The product of its digits is 20901888, while the sum is 66.

The square root of 89898987 is about 9481.5076332828. The cubic root of 89898987 is about 447.9727525813.

The spelling of 89898987 in words is "eighty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-seven".

Divisors: 1 3 401 1203 74729 224187 29966329 89898987