1952390389 has 2 divisors, whose sum is σ = 1952390390. Its totient is φ = 1952390388.

The previous prime is 1952390327. The next prime is 1952390423. The reversal of 1952390389 is 9830932591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1761480900 + 190909489 = 41970^2 + 13817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1952390389 - 2¹⁵ = 1952357621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1952390689) 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, 976195194 + 976195195.

It is an arithmetic number, because the mean of its divisors is an integer number (976195195).

Almost surely, 2^1952390389 is an apocalyptic number.

It is an amenable number.

1952390389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1952390389 is an equidigital number, since it uses as much as digits as its factorization.

1952390389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 1952390389 is about 44185.8618677966. The cubic root of 1952390389 is about 1249.8432633344.

The spelling of 1952390389 in words is "one billion, nine hundred fifty-two million, three hundred ninety thousand, three hundred eighty-nine".