1528623413 has 4 divisors (see below), whose sum is σ = 1531968780. Its totient is φ = 1525278048.

The previous prime is 1528623409. The next prime is 1528623419. The reversal of 1528623413 is 3143268251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3143268251 = 23 ⋅136663837.

It can be written as a sum of positive squares in 2 ways, for example, as 941385124 + 587238289 = 30682^2 + 24233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1528623413 - 2² = 1528623409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528623419) 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 in 3 ways as a sum of consecutive naturals, for example, 1671998 + ... + 1672911.

It is an arithmetic number, because the mean of its divisors is an integer number (382992195).

Almost surely, 2^1528623413 is an apocalyptic number.

It is an amenable number.

1528623413 is a deficient number, since it is larger than the sum of its proper divisors (3345367).

1528623413 is an equidigital number, since it uses as much as digits as its factorization.

1528623413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345366.

The product of its digits is 34560, while the sum is 35.

The square root of 1528623413 is about 39097.6139041758. The cubic root of 1528623413 is about 1151.9496638906.

The spelling of 1528623413 in words is "one billion, five hundred twenty-eight million, six hundred twenty-three thousand, four hundred thirteen".