1864091533 has 2 divisors, whose sum is σ = 1864091534. Its totient is φ = 1864091532.

The previous prime is 1864091507. The next prime is 1864091543. The reversal of 1864091533 is 3351904681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1365819849 + 498271684 = 36957^2 + 22322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1864091533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1864091503) 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, 932045766 + 932045767.

It is an arithmetic number, because the mean of its divisors is an integer number (932045767).

Almost surely, 2^1864091533 is an apocalyptic number.

It is an amenable number.

1864091533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864091533 is an equidigital number, since it uses as much as digits as its factorization.

1864091533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 1864091533 is about 43175.1263229188. The cubic root of 1864091533 is about 1230.7100430272.

The spelling of 1864091533 in words is "one billion, eight hundred sixty-four million, ninety-one thousand, five hundred thirty-three".