1816414409 has 2 divisors, whose sum is σ = 1816414410. Its totient is φ = 1816414408.

The previous prime is 1816414361. The next prime is 1816414423. The reversal of 1816414409 is 9044146181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1122250000 + 694164409 = 33500^2 + 26347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1816414409 is a prime.

It is a super-2 number, since 2×1816414409² = 6598722610445638562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1816411409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908207204 + 908207205.

It is an arithmetic number, because the mean of its divisors is an integer number (908207205).

Almost surely, 2^1816414409 is an apocalyptic number.

It is an amenable number.

1816414409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816414409 is an equidigital number, since it uses as much as digits as its factorization.

1816414409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 1816414409 is about 42619.4135224782. The cubic root of 1816414409 is about 1220.1268364503.

The spelling of 1816414409 in words is "one billion, eight hundred sixteen million, four hundred fourteen thousand, four hundred nine".