91130219 has 2 divisors, whose sum is σ = 91130220. Its totient is φ = 91130218.

The previous prime is 91130147. The next prime is 91130233. The reversal of 91130219 is 91203119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91130219 - 2⁸ = 91129963 is a prime.

It is a super-2 number, since 2×91130219² = 16609433629975922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91130269) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45565109 + 45565110.

It is an arithmetic number, because the mean of its divisors is an integer number (45565110).

Almost surely, 2^91130219 is an apocalyptic number.

91130219 is a deficient number, since it is larger than the sum of its proper divisors (1).

91130219 is an equidigital number, since it uses as much as digits as its factorization.

91130219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 91130219 is about 9546.2149043482. The cubic root of 91130219 is about 450.0085907825.

Subtracting 91130219 from its reverse (91203119), we obtain a square (72900 = 270²).

The spelling of 91130219 in words is "ninety-one million, one hundred thirty thousand, two hundred nineteen".