210402097 has 4 divisors (see below), whose sum is σ = 210675060. Its totient is φ = 210129136.

The previous prime is 210402079. The next prime is 210402109. The reversal of 210402097 is 790204012.

210402097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103713856 + 106688241 = 10184^2 + 10329^2 .

It is a cyclic number.

It is not a de Polignac number, because 210402097 - 2⁷ = 210401969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210402007) 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, 135322 + ... + 136867.

It is an arithmetic number, because the mean of its divisors is an integer number (52668765).

Almost surely, 2^210402097 is an apocalyptic number.

It is an amenable number.

210402097 is a deficient number, since it is larger than the sum of its proper divisors (272963).

210402097 is an equidigital number, since it uses as much as digits as its factorization.

210402097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272962.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 210402097 is about 14505.2437759591. The cubic root of 210402097 is about 594.7713237476.

The spelling of 210402097 in words is "two hundred ten million, four hundred two thousand, ninety-seven".