9121471490 has 16 divisors (see below), whose sum is σ = 16442912952. Its totient is φ = 3643196544.

The previous prime is 9121471487. The next prime is 9121471507. The reversal of 9121471490 is 941741219.

It can be written as a sum of positive squares in 4 ways, for example, as 8342447569 + 779023921 = 91337^2 + 27911^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666899 + ... + 680438.

Almost surely, 2^9121471490 is an apocalyptic number.

9121471490 is a deficient number, since it is larger than the sum of its proper divisors (7321441462).

9121471490 is a wasteful number, since it uses less digits than its factorization.

9121471490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348021.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 9121471490 is about 95506.3950214853. The cubic root of 9121471490 is about 2089.4002147869.

The spelling of 9121471490 in words is "nine billion, one hundred twenty-one million, four hundred seventy-one thousand, four hundred ninety".