90181834 has 4 divisors (see below), whose sum is σ = 135272754. Its totient is φ = 45090916.

The previous prime is 90181823. The next prime is 90181843. The reversal of 90181834 is 43818109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58293225 + 31888609 = 7635^2 + 5647^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 90181834.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22545457 + ... + 22545460.

Almost surely, 2^90181834 is an apocalyptic number.

90181834 is a deficient number, since it is larger than the sum of its proper divisors (45090920).

90181834 is a wasteful number, since it uses less digits than its factorization.

90181834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45090919.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 90181834 is about 9496.4116380873. The cubic root of 90181834 is about 448.4420759827.

The spelling of 90181834 in words is "ninety million, one hundred eighty-one thousand, eight hundred thirty-four".