90871045 has 16 divisors (see below), whose sum is σ = 114561792. Its totient is φ = 69062400.

The previous prime is 90871021. The next prime is 90871049. The reversal of 90871045 is 54017809.

It is a happy number.

It is not a de Polignac number, because 90871045 - 2⁷ = 90870917 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 90871045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90871049) 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, 14749 + ... + 19981.

It is an arithmetic number, because the mean of its divisors is an integer number (7160112).

Almost surely, 2^90871045 is an apocalyptic number.

It is an amenable number.

90871045 is a deficient number, since it is larger than the sum of its proper divisors (23690747).

90871045 is a wasteful number, since it uses less digits than its factorization.

90871045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5412.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 90871045 is about 9532.6305393632. The cubic root of 90871045 is about 449.5815781391.

The spelling of 90871045 in words is "ninety million, eight hundred seventy-one thousand, forty-five".