1023553045 has 4 divisors (see below), whose sum is σ = 1228263660. Its totient is φ = 818842432.

The previous prime is 1023553039. The next prime is 1023553067. The reversal of 1023553045 is 5403553201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5403553201 = 127 ⋅42547663.

It can be written as a sum of positive squares in 2 ways, for example, as 190826596 + 832726449 = 13814^2 + 28857^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023553045 - 2¹⁹ = 1023028757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102355300 + ... + 102355309.

It is an arithmetic number, because the mean of its divisors is an integer number (307065915).

Almost surely, 2^1023553045 is an apocalyptic number.

It is an amenable number.

1023553045 is a deficient number, since it is larger than the sum of its proper divisors (204710615).

1023553045 is an equidigital number, since it uses as much as digits as its factorization.

1023553045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204710614.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 1023553045 is about 31993.0155659013. The cubic root of 1023553045 is about 1007.7901706544.

The spelling of 1023553045 in words is "one billion, twenty-three million, five hundred fifty-three thousand, forty-five".