91609411 has 2 divisors, whose sum is σ = 91609412. Its totient is φ = 91609410.

The previous prime is 91609403. The next prime is 91609421. The reversal of 91609411 is 11490619.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91609411 - 2³ = 91609403 is a prime.

It is not a weakly prime, because it can be changed into another prime (91609421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45804705 + 45804706.

It is an arithmetic number, because the mean of its divisors is an integer number (45804706).

Almost surely, 2^91609411 is an apocalyptic number.

91609411 is a deficient number, since it is larger than the sum of its proper divisors (1).

91609411 is an equidigital number, since it uses as much as digits as its factorization.

91609411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 91609411 is about 9571.2805308381. The cubic root of 91609411 is about 450.7959755828.

The spelling of 91609411 in words is "ninety-one million, six hundred nine thousand, four hundred eleven".