905899213 has 4 divisors (see below), whose sum is σ = 959187420. Its totient is φ = 852611008.

The previous prime is 905899207. The next prime is 905899219. The reversal of 905899213 is 312998509.

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

It is an interprime number because it is at equal distance from previous prime (905899207) and next prime (905899219).

It can be written as a sum of positive squares in 2 ways, for example, as 604078084 + 301821129 = 24578^2 + 17373^2 .

It is a cyclic number.

It is not a de Polignac number, because 905899213 - 2¹⁷ = 905768141 is a prime.

It is a super-2 number, since 2×905899213² = 1641306768228038738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905899219) 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, 26644078 + ... + 26644111.

It is an arithmetic number, because the mean of its divisors is an integer number (239796855).

Almost surely, 2^905899213 is an apocalyptic number.

It is an amenable number.

905899213 is a deficient number, since it is larger than the sum of its proper divisors (53288207).

905899213 is a wasteful number, since it uses less digits than its factorization.

905899213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53288206.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 905899213 is about 30098.1596281234. The cubic root of 905899213 is about 967.5942839787.

The spelling of 905899213 in words is "nine hundred five million, eight hundred ninety-nine thousand, two hundred thirteen".