9090021477 has 32 divisors (see below), whose sum is σ = 12986265600. Its totient is φ = 5639070528.

The previous prime is 9090021463. The next prime is 9090021541. The reversal of 9090021477 is 7741200909.

It is not a de Polignac number, because 9090021477 - 2¹⁰ = 9090020453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090021427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 881968 + ... + 892214.

It is an arithmetic number, because the mean of its divisors is an integer number (405820800).

Almost surely, 2^9090021477 is an apocalyptic number.

It is an amenable number.

9090021477 is a deficient number, since it is larger than the sum of its proper divisors (3896244123).

9090021477 is a wasteful number, since it uses less digits than its factorization.

9090021477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10545.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 9090021477 is about 95341.6041243276. The cubic root of 9090021477 is about 2086.9960949537.

The spelling of 9090021477 in words is "nine billion, ninety million, twenty-one thousand, four hundred seventy-seven".