1870266149 has 2 divisors, whose sum is σ = 1870266150. Its totient is φ = 1870266148.

The previous prime is 1870266143. The next prime is 1870266191. The reversal of 1870266149 is 9416620781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1012830625 + 857435524 = 31825^2 + 29282^2 .

It is an emirp because it is prime and its reverse (9416620781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1870266149 - 2⁴ = 1870266133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1870266143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935133074 + 935133075.

It is an arithmetic number, because the mean of its divisors is an integer number (935133075).

Almost surely, 2^1870266149 is an apocalyptic number.

It is an amenable number.

1870266149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1870266149 is an equidigital number, since it uses as much as digits as its factorization.

1870266149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1870266149 is about 43246.5738411727. The cubic root of 1870266149 is about 1232.0674132185.

The spelling of 1870266149 in words is "one billion, eight hundred seventy million, two hundred sixty-six thousand, one hundred forty-nine".