1918351933 has 2 divisors, whose sum is σ = 1918351934. Its totient is φ = 1918351932.

The previous prime is 1918351759. The next prime is 1918351949. The reversal of 1918351933 is 3391538191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918177209 + 174724 = 43797^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918351933 - 2¹³ = 1918343741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1918351933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918351433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959175966 + 959175967.

It is an arithmetic number, because the mean of its divisors is an integer number (959175967).

Almost surely, 2^1918351933 is an apocalyptic number.

It is an amenable number.

1918351933 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918351933 is an equidigital number, since it uses as much as digits as its factorization.

1918351933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 1918351933 is about 43798.9946574119. The cubic root of 1918351933 is about 1242.5372806269.

The spelling of 1918351933 in words is "one billion, nine hundred eighteen million, three hundred fifty-one thousand, nine hundred thirty-three".