90971949 has 16 divisors (see below), whose sum is σ = 125614080. Its totient is φ = 58501680.

The previous prime is 90971939. The next prime is 90971977. The reversal of 90971949 is 94917909.

It is not a de Polignac number, because 90971949 - 2¹² = 90967853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90971898 and 90971907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90971939) 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, 30862 + ... + 33680.

It is an arithmetic number, because the mean of its divisors is an integer number (7850880).

Almost surely, 2^90971949 is an apocalyptic number.

It is an amenable number.

90971949 is a deficient number, since it is larger than the sum of its proper divisors (34642131).

90971949 is a wasteful number, since it uses less digits than its factorization.

90971949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 90971949 is about 9537.9216289504. The cubic root of 90971949 is about 449.7479230177.

The spelling of 90971949 in words is "ninety million, nine hundred seventy-one thousand, nine hundred forty-nine".