1895398949 has 2 divisors, whose sum is σ = 1895398950. Its totient is φ = 1895398948.

The previous prime is 1895398943. The next prime is 1895398957. The reversal of 1895398949 is 9498935981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1266292225 + 629106724 = 35585^2 + 25082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1895398949 - 2⁸ = 1895398693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1895398943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947699474 + 947699475.

It is an arithmetic number, because the mean of its divisors is an integer number (947699475).

Almost surely, 2^1895398949 is an apocalyptic number.

It is an amenable number.

1895398949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1895398949 is an equidigital number, since it uses as much as digits as its factorization.

1895398949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 65.

The square root of 1895398949 is about 43536.1797703933. The cubic root of 1895398949 is about 1237.5617516238.

The spelling of 1895398949 in words is "one billion, eight hundred ninety-five million, three hundred ninety-eight thousand, nine hundred forty-nine".