Search a number
61091 is a prime number
BaseRepresentation
bin1110111010100011
310002210122
432322203
53423331
61150455
7343052
oct167243
9102718
1061091
1141998
122b42b
1321a64
1418399
151317b
hexeea3

61091 has 2 divisors, whose sum is σ = 61092. Its totient is φ = 61090.

The previous prime is 61057. The next prime is 61099. The reversal of 61091 is 19016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61091 - 26 = 61027 is a prime.

It is a super-2 number, since 2×610912 = 7464220562, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (61099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30545 + 30546.

It is an arithmetic number, because the mean of its divisors is an integer number (30546).

261091 is an apocalyptic number.

61091 is a deficient number, since it is larger than the sum of its proper divisors (1).

61091 is an equidigital number, since it uses as much as digits as its factorization.

61091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 61091 is about 247.1659361644. The cubic root of 61091 is about 39.3845370364.

The spelling of 61091 in words is "sixty-one thousand, ninety-one".