1520345423 has 2 divisors, whose sum is σ = 1520345424. Its totient is φ = 1520345422.

The previous prime is 1520345417. The next prime is 1520345459. The reversal of 1520345423 is 3245430251.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1520345423 - 2²⁰ = 1519296847 is a prime.

It is a super-2 number, since 2×1520345423² = 4622900410474097858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520345413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760172711 + 760172712.

It is an arithmetic number, because the mean of its divisors is an integer number (760172712).

Almost surely, 2^1520345423 is an apocalyptic number.

1520345423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520345423 is an equidigital number, since it uses as much as digits as its factorization.

1520345423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 1520345423 is about 38991.6070840893. The cubic root of 1520345423 is about 1149.8665057394.

Adding to 1520345423 its reverse (3245430251), we get a palindrome (4765775674).

The spelling of 1520345423 in words is "one billion, five hundred twenty million, three hundred forty-five thousand, four hundred twenty-three".