90912071 has 16 divisors (see below), whose sum is σ = 97310400. Its totient is φ = 84768768.

The previous prime is 90912067. The next prime is 90912079. The reversal of 90912071 is 17021909.

It is a cyclic number.

It is not a de Polignac number, because 90912071 - 2² = 90912067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90912079) 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, 206870 + ... + 207308.

It is an arithmetic number, because the mean of its divisors is an integer number (6081900).

Almost surely, 2^90912071 is an apocalyptic number.

90912071 is a deficient number, since it is larger than the sum of its proper divisors (6398329).

90912071 is a wasteful number, since it uses less digits than its factorization.

90912071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 90912071 is about 9534.7821684609. The cubic root of 90912071 is about 449.6492262323.

The spelling of 90912071 in words is "ninety million, nine hundred twelve thousand, seventy-one".