90971834 has 4 divisors (see below), whose sum is σ = 136457754. Its totient is φ = 45485916.

The previous prime is 90971833. The next prime is 90971843. The reversal of 90971834 is 43817909.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43817909 = 53 ⋅826753.

It can be written as a sum of positive squares in only one way, i.e., 80048809 + 10923025 = 8947^2 + 3305^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90971791 and 90971800.

It is not an unprimeable number, because it can be changed into a prime (90971833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22742957 + ... + 22742960.

Almost surely, 2^90971834 is an apocalyptic number.

90971834 is a deficient number, since it is larger than the sum of its proper divisors (45485920).

90971834 is a wasteful number, since it uses less digits than its factorization.

90971834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45485919.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 90971834 is about 9537.9156003815. The cubic root of 90971834 is about 449.7477335049.

The spelling of 90971834 in words is "ninety million, nine hundred seventy-one thousand, eight hundred thirty-four".