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164275489 = 7218312
BaseRepresentation
bin10011100101010…
…10010100100001
3102110010001121101
421302222110201
5314023303424
624144554401
74033214200
oct1162522441
9373101541
10164275489
1184802674
1247022a01
1328059841
1417b63237
15e64e344
hex9caa521

164275489 has 9 divisors (see below), whose sum is σ = 191200401. Its totient is φ = 140730660.

The previous prime is 164275483. The next prime is 164275493. The reversal of 164275489 is 984572461.

The square root of 164275489 is 12817.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 164275489 - 213 = 164267297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164275483) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 88804 + ... + 90634.

It is an arithmetic number, because the mean of its divisors is an integer number (21244489).

Almost surely, 2164275489 is an apocalyptic number.

164275489 is the 12817-th square number.

164275489 is the 6409-th centered octagonal number.

It is an amenable number.

164275489 is a deficient number, since it is larger than the sum of its proper divisors (26924912).

164275489 is an frugal number, since it uses more digits than its factorization.

164275489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676 (or 1838 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The cubic root of 164275489 is about 547.6766889401.

It can be divided in two parts, 164 and 275489, that added together give a triangular number (275653 = T742).

The spelling of 164275489 in words is "one hundred sixty-four million, two hundred seventy-five thousand, four hundred eighty-nine".

Divisors: 1 7 49 1831 12817 89719 3352561 23467927 164275489