90279971 has 6 divisors (see below), whose sum is σ = 91884420. Its totient is φ = 88678056.

The previous prime is 90279953. The next prime is 90279977. The reversal of 90279971 is 17997209.

It is a de Polignac number, because none of the positive numbers 2^k-90279971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90279977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72365 + ... + 73601.

It is an arithmetic number, because the mean of its divisors is an integer number (15314070).

Almost surely, 2^90279971 is an apocalyptic number.

90279971 is a deficient number, since it is larger than the sum of its proper divisors (1604449).

90279971 is an frugal number, since it uses more digits than its factorization.

90279971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 90279971 is about 9501.5772901135. The cubic root of 90279971 is about 448.6046837722.

The spelling of 90279971 in words is "ninety million, two hundred seventy-nine thousand, nine hundred seventy-one".