12919091 has 2 divisors, whose sum is σ = 12919092. Its totient is φ = 12919090.

The previous prime is 12919061. The next prime is 12919097. The reversal of 12919091 is 19091921.

It is a strong prime.

It is an emirp because it is prime and its reverse (19091921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12919091 - 2²² = 8724787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12919097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459545 + 6459546.

It is an arithmetic number, because the mean of its divisors is an integer number (6459546).

Almost surely, 2^12919091 is an apocalyptic number.

12919091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12919091 is an equidigital number, since it uses as much as digits as its factorization.

12919091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 12919091 is about 3594.3137036158. The cubic root of 12919091 is about 234.6446477794.

The spelling of 12919091 in words is "twelve million, nine hundred nineteen thousand, ninety-one".