1023530493 has 4 divisors (see below), whose sum is σ = 1364707328. Its totient is φ = 682353660.

The previous prime is 1023530483. The next prime is 1023530539. The reversal of 1023530493 is 3940353201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3940353201 = 3 ⋅1313451067.

It is not a de Polignac number, because 1023530493 - 2⁴ = 1023530477 is a prime.

It is a super-2 number, since 2×1023530493² = 2095229340201646098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023530493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023530423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170588413 + ... + 170588418.

It is an arithmetic number, because the mean of its divisors is an integer number (341176832).

Almost surely, 2^1023530493 is an apocalyptic number.

It is an amenable number.

1023530493 is a deficient number, since it is larger than the sum of its proper divisors (341176835).

1023530493 is an equidigital number, since it uses as much as digits as its factorization.

1023530493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341176834.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 1023530493 is about 31992.6631120324. The cubic root of 1023530493 is about 1007.7827690348.

Adding to 1023530493 its reverse (3940353201), we get a palindrome (4963883694).

The spelling of 1023530493 in words is "one billion, twenty-three million, five hundred thirty thousand, four hundred ninety-three".