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18610061 is a prime number
BaseRepresentation
bin100011011111…
…1011110001101
31022000111012112
41012333132031
514231010221
61502513405
7314116511
oct106773615
938014175
1018610061
11a561018
126295865
133b17892
142686141
15197915b
hex11bf78d

18610061 has 2 divisors, whose sum is σ = 18610062. Its totient is φ = 18610060.

The previous prime is 18610051. The next prime is 18610069. The reversal of 18610061 is 16001681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17598025 + 1012036 = 4195^2 + 1006^2 .

It is an emirp because it is prime and its reverse (16001681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18610061 - 222 = 14415757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18610069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9305030 + 9305031.

It is an arithmetic number, because the mean of its divisors is an integer number (9305031).

Almost surely, 218610061 is an apocalyptic number.

It is an amenable number.

18610061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18610061 is an equidigital number, since it uses as much as digits as its factorization.

18610061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 18610061 is about 4313.9379921367. The cubic root of 18610061 is about 265.0020695222.

The spelling of 18610061 in words is "eighteen million, six hundred ten thousand, sixty-one".