1904669213 has 2 divisors, whose sum is σ = 1904669214. Its totient is φ = 1904669212.

The previous prime is 1904669203. The next prime is 1904669243. The reversal of 1904669213 is 3129664091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145280964 + 759388249 = 33842^2 + 27557^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904669213 - 2⁶ = 1904669149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1904669203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952334606 + 952334607.

It is an arithmetic number, because the mean of its divisors is an integer number (952334607).

Almost surely, 2^1904669213 is an apocalyptic number.

It is an amenable number.

1904669213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904669213 is an equidigital number, since it uses as much as digits as its factorization.

1904669213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1904669213 is about 43642.5161167410. The cubic root of 1904669213 is about 1239.5760805939.

The spelling of 1904669213 in words is "one billion, nine hundred four million, six hundred sixty-nine thousand, two hundred thirteen".