90009019 has 8 divisors (see below), whose sum is σ = 92229632. Its totient is φ = 87794280.

The previous prime is 90009001. The next prime is 90009037. The reversal of 90009019 is 91090009.

It is an interprime number because it is at equal distance from previous prime (90009001) and next prime (90009037).

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 90009019 - 2¹⁵ = 89976251 is a prime.

It is a super-2 number, since 2×90009019² = 16203247002684722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90009119) 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, 60454 + ... + 61924.

It is an arithmetic number, because the mean of its divisors is an integer number (11528704).

Almost surely, 2^90009019 is an apocalyptic number.

90009019 is the 5478-th hex number.

90009019 is a deficient number, since it is larger than the sum of its proper divisors (2220613).

90009019 is a wasteful number, since it uses less digits than its factorization.

90009019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 90009019 is about 9487.3083116340. The cubic root of 90009019 is about 448.1554437073.

The spelling of 90009019 in words is "ninety million, nine thousand, nineteen".