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2970889 = 15531913
BaseRepresentation
bin1011010101010100001001
312120221021221
423111110021
51230032024
6143402041
734152325
oct13252411
95527257
102970889
11174a089
12bb3321
1380032c
14574985
153da3e4
hex2d5509

2970889 has 4 divisors (see below), whose sum is σ = 2974356. Its totient is φ = 2967424.

The previous prime is 2970857. The next prime is 2970893. The reversal of 2970889 is 9880792.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1420864 + 1550025 = 1192^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 2970889 - 25 = 2970857 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2970689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597 + ... + 2509.

It is an arithmetic number, because the mean of its divisors is an integer number (743589).

22970889 is an apocalyptic number.

It is an amenable number.

2970889 is a deficient number, since it is larger than the sum of its proper divisors (3467).

2970889 is a wasteful number, since it uses less digits than its factorization.

2970889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 2970889 is about 1723.6266997236. The cubic root of 2970889 is about 143.7569362753.

Subtracting 2970889 from its reverse (9880792), we obtain a triangular number (6909903 = T3717).

The spelling of 2970889 in words is "two million, nine hundred seventy thousand, eight hundred eighty-nine".

Divisors: 1 1553 1913 2970889