9090918291 has 64 divisors (see below), whose sum is σ = 15595517952. Its totient is φ = 4578342912.

The previous prime is 9090918281. The next prime is 9090918341. The reversal of 9090918291 is 1928190909.

It is not a de Polignac number, because 9090918291 - 2¹⁰ = 9090917267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9090918291.

It is not an unprimeable number, because it can be changed into a prime (9090918281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4852731 + ... + 4854603.

It is an arithmetic number, because the mean of its divisors is an integer number (243679968).

Almost surely, 2^9090918291 is an apocalyptic number.

9090918291 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9090918291 is a deficient number, since it is larger than the sum of its proper divisors (6504599661).

9090918291 is a wasteful number, since it uses less digits than its factorization.

9090918291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692.

The product of its (nonzero) digits is 104976, while the sum is 48.

The square root of 9090918291 is about 95346.3071702308. The cubic root of 9090918291 is about 2087.0647264662.

The spelling of 9090918291 in words is "nine billion, ninety million, nine hundred eighteen thousand, two hundred ninety-one".