90227391 has 16 divisors (see below), whose sum is σ = 125690880. Its totient is φ = 57504960.

The previous prime is 90227387. The next prime is 90227407. The reversal of 90227391 is 19372209.

It is not a de Polignac number, because 90227391 - 2² = 90227387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90227311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875 + ... + 13563.

It is an arithmetic number, because the mean of its divisors is an integer number (7855680).

Almost surely, 2^90227391 is an apocalyptic number.

90227391 is a deficient number, since it is larger than the sum of its proper divisors (35463489).

90227391 is a wasteful number, since it uses less digits than its factorization.

90227391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11806.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90227391 is about 9498.8099780973. The cubic root of 90227391 is about 448.5175761715.

The spelling of 90227391 in words is "ninety million, two hundred twenty-seven thousand, three hundred ninety-one".