1918748437 has 2 divisors, whose sum is σ = 1918748438. Its totient is φ = 1918748436.

The previous prime is 1918748411. The next prime is 1918748467. The reversal of 1918748437 is 7348478191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261031121 + 657717316 = 35511^2 + 25646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1918748437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918748467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959374218 + 959374219.

It is an arithmetic number, because the mean of its divisors is an integer number (959374219).

Almost surely, 2^1918748437 is an apocalyptic number.

It is an amenable number.

1918748437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918748437 is an equidigital number, since it uses as much as digits as its factorization.

1918748437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The square root of 1918748437 is about 43803.5208288101. The cubic root of 1918748437 is about 1242.6228813716.

The spelling of 1918748437 in words is "one billion, nine hundred eighteen million, seven hundred forty-eight thousand, four hundred thirty-seven".