90955091 has 4 divisors (see below), whose sum is σ = 91463400. Its totient is φ = 90446784.

The previous prime is 90955079. The next prime is 90955129. The reversal of 90955091 is 19055909.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90955091 - 2¹⁰ = 90954067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90955021) 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, 253886 + ... + 254243.

It is an arithmetic number, because the mean of its divisors is an integer number (22865850).

Almost surely, 2^90955091 is an apocalyptic number.

90955091 is a deficient number, since it is larger than the sum of its proper divisors (508309).

90955091 is a wasteful number, since it uses less digits than its factorization.

90955091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508308.

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 90955091 is about 9537.0378524991. The cubic root of 90955091 is about 449.7201403918.

The spelling of 90955091 in words is "ninety million, nine hundred fifty-five thousand, ninety-one".