90091067 has 4 divisors (see below), whose sum is σ = 98281176. Its totient is φ = 81900960.

The previous prime is 90091037. The next prime is 90091087. The reversal of 90091067 is 76019009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76019009 = 11 ⋅6910819.

It is a cyclic number.

It is not a de Polignac number, because 90091067 - 2¹⁰ = 90090043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90091037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4095038 + ... + 4095059.

It is an arithmetic number, because the mean of its divisors is an integer number (24570294).

Almost surely, 2^90091067 is an apocalyptic number.

90091067 is a deficient number, since it is larger than the sum of its proper divisors (8190109).

90091067 is a wasteful number, since it uses less digits than its factorization.

90091067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8190108.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 90091067 is about 9491.6314193083. The cubic root of 90091067 is about 448.2915748463.

The spelling of 90091067 in words is "ninety million, ninety-one thousand, sixty-seven".