90247971 has 24 divisors (see below), whose sum is σ = 136841040. Its totient is φ = 52803520.

The previous prime is 90247961. The next prime is 90247999. The reversal of 90247971 is 17974209.

It is not a de Polignac number, because 90247971 - 2⁵ = 90247939 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90247931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6241 + ... + 14813.

It is an arithmetic number, because the mean of its divisors is an integer number (5701710).

Almost surely, 2^90247971 is an apocalyptic number.

90247971 is a deficient number, since it is larger than the sum of its proper divisors (46593069).

90247971 is a wasteful number, since it uses less digits than its factorization.

90247971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8627 (or 8616 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 90247971 is about 9499.8932099261. The cubic root of 90247971 is about 448.5516744274.

The spelling of 90247971 in words is "ninety million, two hundred forty-seven thousand, nine hundred seventy-one".