210342997 has 8 divisors (see below), whose sum is σ = 216262872. Its totient is φ = 204460800.

The previous prime is 210342983. The next prime is 210343019. The reversal of 210342997 is 799243012.

It can be written as a sum of positive squares in 4 ways, for example, as 16966161 + 193376836 = 4119^2 + 13906^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210342997 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 (210342917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2097 + ... + 20617.

It is an arithmetic number, because the mean of its divisors is an integer number (27032859).

Almost surely, 2^210342997 is an apocalyptic number.

It is an amenable number.

210342997 is a deficient number, since it is larger than the sum of its proper divisors (5919875).

210342997 is a wasteful number, since it uses less digits than its factorization.

210342997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18839.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 210342997 is about 14503.2064385776. The cubic root of 210342997 is about 594.7156299476.

The spelling of 210342997 in words is "two hundred ten million, three hundred forty-two thousand, nine hundred ninety-seven".