1861466213 has 2 divisors, whose sum is σ = 1861466214. Its totient is φ = 1861466212.

The previous prime is 1861466197. The next prime is 1861466219. The reversal of 1861466213 is 3126641681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1184529889 + 676936324 = 34417^2 + 26018^2 .

It is a cyclic number.

It is not a de Polignac number, because 1861466213 - 2⁴ = 1861466197 is a prime.

It is a super-2 number, since 2×1861466213² = 6930112924281122738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1861466219) 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, 930733106 + 930733107.

It is an arithmetic number, because the mean of its divisors is an integer number (930733107).

Almost surely, 2^1861466213 is an apocalyptic number.

It is an amenable number.

1861466213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861466213 is an equidigital number, since it uses as much as digits as its factorization.

1861466213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 1861466213 is about 43144.7124570323. The cubic root of 1861466213 is about 1230.1320088780.

The spelling of 1861466213 in words is "one billion, eight hundred sixty-one million, four hundred sixty-six thousand, two hundred thirteen".