210429993 has 4 divisors (see below), whose sum is σ = 280573328. Its totient is φ = 140286660.

The previous prime is 210429991. The next prime is 210430001. The reversal of 210429993 is 399924012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 210429993 - 2¹ = 210429991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210429991) 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, 35071663 + ... + 35071668.

It is an arithmetic number, because the mean of its divisors is an integer number (70143332).

Almost surely, 2^210429993 is an apocalyptic number.

It is an amenable number.

210429993 is a deficient number, since it is larger than the sum of its proper divisors (70143335).

210429993 is an equidigital number, since it uses as much as digits as its factorization.

210429993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70143334.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 210429993 is about 14506.2053273763. The cubic root of 210429993 is about 594.7976083520.

The spelling of 210429993 in words is "two hundred ten million, four hundred twenty-nine thousand, nine hundred ninety-three".