1964071393 has 2 divisors, whose sum is σ = 1964071394. Its totient is φ = 1964071392.

The previous prime is 1964071337. The next prime is 1964071427. The reversal of 1964071393 is 3931704691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1513443409 + 450627984 = 38903^2 + 21228^2 .

It is a cyclic number.

It is not a de Polignac number, because 1964071393 - 2²¹ = 1961974241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1964071303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982035696 + 982035697.

It is an arithmetic number, because the mean of its divisors is an integer number (982035697).

Almost surely, 2^1964071393 is an apocalyptic number.

It is an amenable number.

1964071393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1964071393 is an equidigital number, since it uses as much as digits as its factorization.

1964071393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 1964071393 is about 44317.8450852475. The cubic root of 1964071393 is about 1252.3308813986.

The spelling of 1964071393 in words is "one billion, nine hundred sixty-four million, seventy-one thousand, three hundred ninety-three".