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72091 is a prime number
BaseRepresentation
bin10001100110011011
310122220001
4101212123
54301331
61313431
7420115
oct214633
9118801
1072091
114a188
1235877
1326a76
141c3b5
1516561
hex1199b

72091 has 2 divisors, whose sum is σ = 72092. Its totient is φ = 72090.

The previous prime is 72089. The next prime is 72101. The reversal of 72091 is 19027.

72091 is nontrivially palindromic in base 15.

72091 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72091 - 21 = 72089 is a prime.

It is a super-2 number, since 2×720912 = 10394224562, which contains 22 as substring.

Together with 72089, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (72031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36045 + 36046.

It is an arithmetic number, because the mean of its divisors is an integer number (36046).

272091 is an apocalyptic number.

72091 is a deficient number, since it is larger than the sum of its proper divisors (1).

72091 is an equidigital number, since it uses as much as digits as its factorization.

72091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 72091 is about 268.4976722432. The cubic root of 72091 is about 41.6191957145.

The spelling of 72091 in words is "seventy-two thousand, ninety-one".