90401219 has 4 divisors (see below), whose sum is σ = 90420720. Its totient is φ = 90381720.

The previous prime is 90401209. The next prime is 90401273. The reversal of 90401219 is 91210409.

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

It is a cyclic number.

It is not a de Polignac number, because 90401219 - 2⁴ = 90401203 is a prime.

It is a super-2 number, since 2×90401219² = 16344760793371922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90401209) 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, 1637 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (22605180).

Almost surely, 2^90401219 is an apocalyptic number.

90401219 is a deficient number, since it is larger than the sum of its proper divisors (19501).

90401219 is a wasteful number, since it uses less digits than its factorization.

90401219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19500.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 90401219 is about 9507.9555636320. The cubic root of 90401219 is about 448.8054226078.

The spelling of 90401219 in words is "ninety million, four hundred one thousand, two hundred nineteen".