900690019 has 2 divisors, whose sum is σ = 900690020. Its totient is φ = 900690018.

The previous prime is 900690017. The next prime is 900690029. The reversal of 900690019 is 910096009.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 900690019 - 2¹ = 900690017 is a prime.

It is a super-3 number, since 3×900690019³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 900690017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (900690013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450345009 + 450345010.

It is an arithmetic number, because the mean of its divisors is an integer number (450345010).

Almost surely, 2^900690019 is an apocalyptic number.

900690019 is a deficient number, since it is larger than the sum of its proper divisors (1).

900690019 is an equidigital number, since it uses as much as digits as its factorization.

900690019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 900690019 is about 30011.4981132232. The cubic root of 900690019 is about 965.7360645445.

The spelling of 900690019 in words is "nine hundred million, six hundred ninety thousand, nineteen".