990001213 has 16 divisors (see below), whose sum is σ = 1122508800. Its totient is φ = 868166640.

The previous prime is 990001189. The next prime is 990001237. The reversal of 990001213 is 312100099.

It is an interprime number because it is at equal distance from previous prime (990001189) and next prime (990001237).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990001213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990001283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22993 + ... + 50086.

It is an arithmetic number, because the mean of its divisors is an integer number (70156800).

Almost surely, 2^990001213 is an apocalyptic number.

It is an amenable number.

990001213 is a deficient number, since it is larger than the sum of its proper divisors (132507587).

990001213 is a wasteful number, since it uses less digits than its factorization.

990001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73152.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 990001213 is about 31464.2847209340. The cubic root of 990001213 is about 996.6559004640.

The spelling of 990001213 in words is "nine hundred ninety million, one thousand, two hundred thirteen".