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7661189 is a prime number
BaseRepresentation
bin11101001110011010000101
3112102020011202
4131032122011
53430124224
6432112245
7122055554
oct35163205
915366152
107661189
114362a68
122695685
131783163
141035d9b
15a14eae
hex74e685

7661189 has 2 divisors, whose sum is σ = 7661190. Its totient is φ = 7661188.

The previous prime is 7661119. The next prime is 7661197. The reversal of 7661189 is 9811667.

7661189 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7656289 + 4900 = 2767^2 + 70^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7661189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7661119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830594 + 3830595.

It is an arithmetic number, because the mean of its divisors is an integer number (3830595).

Almost surely, 27661189 is an apocalyptic number.

It is an amenable number.

7661189 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661189 is an equidigital number, since it uses as much as digits as its factorization.

7661189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 7661189 is about 2767.8852938661. The cubic root of 7661189 is about 197.1357512117.

The spelling of 7661189 in words is "seven million, six hundred sixty-one thousand, one hundred eighty-nine".