210030993 has 12 divisors (see below), whose sum is σ = 307651968. Its totient is φ = 138048120.

The previous prime is 210030929. The next prime is 210031007. The reversal of 210030993 is 399030012.

It is not a de Polignac number, because 210030993 - 2⁶ = 210030929 is a prime.

It is a super-2 number, since 2×210030993² = 88226036041132098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210030913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163705 + ... + 164982.

It is an arithmetic number, because the mean of its divisors is an integer number (25637664).

Almost surely, 2^210030993 is an apocalyptic number.

It is an amenable number.

210030993 is a deficient number, since it is larger than the sum of its proper divisors (97620975).

210030993 is a wasteful number, since it uses less digits than its factorization.

210030993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328764 (or 328761 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 210030993 is about 14492.4460668308. The cubic root of 210030993 is about 594.4214351035.

The spelling of 210030993 in words is "two hundred ten million, thirty thousand, nine hundred ninety-three".