90253791 has 8 divisors (see below), whose sum is σ = 133709360. Its totient is φ = 60169176.

The previous prime is 90253789. The next prime is 90253811. The reversal of 90253791 is 19735209.

It is not a de Polignac number, because 90253791 - 2¹ = 90253789 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 (90253711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1671340 + ... + 1671393.

It is an arithmetic number, because the mean of its divisors is an integer number (16713670).

Almost surely, 2^90253791 is an apocalyptic number.

90253791 is a deficient number, since it is larger than the sum of its proper divisors (43455569).

90253791 is a wasteful number, since it uses less digits than its factorization.

90253791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342742 (or 3342736 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 90253791 is about 9500.1995242205. The cubic root of 90253791 is about 448.5613164342.

The spelling of 90253791 in words is "ninety million, two hundred fifty-three thousand, seven hundred ninety-one".