90394819 has 8 divisors (see below), whose sum is σ = 91068480. Its totient is φ = 89724096.

The previous prime is 90394817. The next prime is 90394849. The reversal of 90394819 is 91849309.

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

It is a cyclic number.

It is not a de Polignac number, because 90394819 - 2¹ = 90394817 is a prime.

It is a super-2 number, since 2×90394819² = 16342446604085522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90394813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146199 + ... + 146815.

It is an arithmetic number, because the mean of its divisors is an integer number (11383560).

Almost surely, 2^90394819 is an apocalyptic number.

90394819 is a deficient number, since it is larger than the sum of its proper divisors (673661).

90394819 is a wasteful number, since it uses less digits than its factorization.

90394819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 90394819 is about 9507.6189974147. The cubic root of 90394819 is about 448.7948312223.

The spelling of 90394819 in words is "ninety million, three hundred ninety-four thousand, eight hundred nineteen".