90278971 has 8 divisors (see below), whose sum is σ = 91238000. Its totient is φ = 89324640.

The previous prime is 90278953. The next prime is 90278983. The reversal of 90278971 is 17987209.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90278971 - 2¹⁹ = 89754683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90278911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47581 + ... + 49441.

It is an arithmetic number, because the mean of its divisors is an integer number (11404750).

Almost surely, 2^90278971 is an apocalyptic number.

90278971 is a deficient number, since it is larger than the sum of its proper divisors (959029).

90278971 is a wasteful number, since it uses less digits than its factorization.

90278971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 90278971 is about 9501.5246671258. The cubic root of 90278971 is about 448.6030274198.

The spelling of 90278971 in words is "ninety million, two hundred seventy-eight thousand, nine hundred seventy-one".