1816299937 has 2 divisors, whose sum is σ = 1816299938. Its totient is φ = 1816299936.

The previous prime is 1816299887. The next prime is 1816300019. The reversal of 1816299937 is 7399926181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1558986256 + 257313681 = 39484^2 + 16041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816299937 - 2¹⁵ = 1816267169 is a prime.

It is a super-2 number, since 2×1816299937² = 6597890922292407938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1816299337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908149968 + 908149969.

It is an arithmetic number, because the mean of its divisors is an integer number (908149969).

Almost surely, 2^1816299937 is an apocalyptic number.

It is an amenable number.

1816299937 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816299937 is an equidigital number, since it uses as much as digits as its factorization.

1816299937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 1816299937 is about 42618.0705452511. The cubic root of 1816299937 is about 1220.1012047639.

The spelling of 1816299937 in words is "one billion, eight hundred sixteen million, two hundred ninety-nine thousand, nine hundred thirty-seven".