90131447 has 16 divisors (see below), whose sum is σ = 105237504. Its totient is φ = 75600000.

The previous prime is 90131413. The next prime is 90131453. The reversal of 90131447 is 74413109.

It is not a de Polignac number, because 90131447 - 2⁸ = 90131191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90131047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74447 + ... + 75647.

It is an arithmetic number, because the mean of its divisors is an integer number (6577344).

Almost surely, 2^90131447 is an apocalyptic number.

90131447 is a deficient number, since it is larger than the sum of its proper divisors (15106057).

90131447 is a wasteful number, since it uses less digits than its factorization.

90131447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 90131447 is about 9493.7583179687. The cubic root of 90131447 is about 448.3585415669.

The spelling of 90131447 in words is "ninety million, one hundred thirty-one thousand, four hundred forty-seven".