2109454169 has 2 divisors, whose sum is σ = 2109454170. Its totient is φ = 2109454168.

The previous prime is 2109454159. The next prime is 2109454211. The reversal of 2109454169 is 9614549012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1058851600 + 1050602569 = 32540^2 + 32413^2 .

It is a cyclic number.

It is not a de Polignac number, because 2109454169 - 2¹² = 2109450073 is a prime.

It is a super-2 number, since 2×2109454169² = 8899593782222961122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2109454159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054727084 + 1054727085.

It is an arithmetic number, because the mean of its divisors is an integer number (1054727085).

Almost surely, 2^2109454169 is an apocalyptic number.

It is an amenable number.

2109454169 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109454169 is an equidigital number, since it uses as much as digits as its factorization.

2109454169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 2109454169 is about 45928.7945520019. The cubic root of 2109454169 is about 1282.4980044984.

The spelling of 2109454169 in words is "two billion, one hundred nine million, four hundred fifty-four thousand, one hundred sixty-nine".