1520439493 has 2 divisors, whose sum is σ = 1520439494. Its totient is φ = 1520439492.

The previous prime is 1520439469. The next prime is 1520439497. The reversal of 1520439493 is 3949340251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1472870884 + 47568609 = 38378^2 + 6897^2 .

It is an emirp because it is prime and its reverse (3949340251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1520439493 - 2¹⁷ = 1520308421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520439497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760219746 + 760219747.

It is an arithmetic number, because the mean of its divisors is an integer number (760219747).

Almost surely, 2^1520439493 is an apocalyptic number.

It is an amenable number.

1520439493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520439493 is an equidigital number, since it uses as much as digits as its factorization.

1520439493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 1520439493 is about 38992.8133506676. The cubic root of 1520439493 is about 1149.8902209008.

The spelling of 1520439493 in words is "one billion, five hundred twenty million, four hundred thirty-nine thousand, four hundred ninety-three".