90810194 has 8 divisors (see below), whose sum is σ = 140912460. Its totient is φ = 43839376.

The previous prime is 90810193. The next prime is 90810221. The reversal of 90810194 is 49101809.

It can be written as a sum of positive squares in 2 ways, for example, as 79834225 + 10975969 = 8935^2 + 3313^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90810194.

It is not an unprimeable number, because it can be changed into a prime (90810193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782789 + ... + 782904.

Almost surely, 2^90810194 is an apocalyptic number.

90810194 is a deficient number, since it is larger than the sum of its proper divisors (50102266).

90810194 is a wasteful number, since it uses less digits than its factorization.

90810194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565724.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 90810194 is about 9529.4382835506. The cubic root of 90810194 is about 449.4812029409.

The spelling of 90810194 in words is "ninety million, eight hundred ten thousand, one hundred ninety-four".