9491389490 has 16 divisors (see below), whose sum is σ = 18637637760. Its totient is φ = 3451414320.

The previous prime is 9491389487. The next prime is 9491389541. The reversal of 9491389490 is 949831949.

9491389490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 43142570 + ... + 43142789.

It is an arithmetic number, because the mean of its divisors is an integer number (1164852360).

Almost surely, 2^9491389490 is an apocalyptic number.

9491389490 is a deficient number, since it is larger than the sum of its proper divisors (9146248270).

9491389490 is a wasteful number, since it uses less digits than its factorization.

9491389490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86285377.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The square root of 9491389490 is about 97423.7624504412. The cubic root of 9491389490 is about 2117.2717285117.

The spelling of 9491389490 in words is "nine billion, four hundred ninety-one million, three hundred eighty-nine thousand, four hundred ninety".