9090851421 has 8 divisors (see below), whose sum is σ = 12132873280. Its totient is φ = 6054698592.

The previous prime is 9090851387. The next prime is 9090851461. The reversal of 9090851421 is 1241580909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9090851421 - 2¹⁰ = 9090850397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9090851421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090851461) 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 7 ways as a sum of consecutive naturals, for example, 1463641 + ... + 1469838.

It is an arithmetic number, because the mean of its divisors is an integer number (1516609160).

Almost surely, 2^9090851421 is an apocalyptic number.

It is an amenable number.

9090851421 is a deficient number, since it is larger than the sum of its proper divisors (3042021859).

9090851421 is a wasteful number, since it uses less digits than its factorization.

9090851421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934515.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 9090851421 is about 95345.9565005250. The cubic root of 9090851421 is about 2087.0596091848.

The spelling of 9090851421 in words is "nine billion, ninety million, eight hundred fifty-one thousand, four hundred twenty-one".