9040534021 has 2 divisors, whose sum is σ = 9040534022. Its totient is φ = 9040534020.

The previous prime is 9040533961. The next prime is 9040534043. The reversal of 9040534021 is 1204350409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9032411521 + 8122500 = 95039^2 + 2850^2 .

It is a cyclic number.

It is not a de Polignac number, because 9040534021 - 2²³ = 9032145413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9040534121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4520267010 + 4520267011.

It is an arithmetic number, because the mean of its divisors is an integer number (4520267011).

Almost surely, 2^9040534021 is an apocalyptic number.

It is an amenable number.

9040534021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9040534021 is an equidigital number, since it uses as much as digits as its factorization.

9040534021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 9040534021 is about 95081.7228546054. The cubic root of 9040534021 is about 2083.2018934092.

The spelling of 9040534021 in words is "nine billion, forty million, five hundred thirty-four thousand, twenty-one".