210109057 has 2 divisors, whose sum is σ = 210109058. Its totient is φ = 210109056.

The previous prime is 210109033. The next prime is 210109061. The reversal of 210109057 is 750901012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172764736 + 37344321 = 13144^2 + 6111^2 .

It is a cyclic number.

It is not a de Polignac number, because 210109057 - 2⁷ = 210108929 is a prime.

It is not a weakly prime, because it can be changed into another prime (210109007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105054528 + 105054529.

It is an arithmetic number, because the mean of its divisors is an integer number (105054529).

Almost surely, 2^210109057 is an apocalyptic number.

It is an amenable number.

210109057 is a deficient number, since it is larger than the sum of its proper divisors (1).

210109057 is an equidigital number, since it uses as much as digits as its factorization.

210109057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 210109057 is about 14495.1390817750. The cubic root of 210109057 is about 594.4950705329.

The spelling of 210109057 in words is "two hundred ten million, one hundred nine thousand, fifty-seven".