1023513013 has 4 divisors (see below), whose sum is σ = 1023737728. Its totient is φ = 1023288300.

The previous prime is 1023512993. The next prime is 1023513059. The reversal of 1023513013 is 3103153201.

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: 3103153201 = 5581 ⋅556021.

It is a cyclic number.

It is not a de Polignac number, because 1023513013 - 2¹³ = 1023504821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023543013) 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, 105381 + ... + 114682.

It is an arithmetic number, because the mean of its divisors is an integer number (255934432).

Almost surely, 2^1023513013 is an apocalyptic number.

It is an amenable number.

1023513013 is a deficient number, since it is larger than the sum of its proper divisors (224715).

1023513013 is an equidigital number, since it uses as much as digits as its factorization.

1023513013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224714.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1023513013 is about 31992.3899232302. The cubic root of 1023513013 is about 1007.7770319828. Note that the first 3 decimals are identical.

Adding to 1023513013 its reverse (3103153201), we get a palindrome (4126666214).

The spelling of 1023513013 in words is "one billion, twenty-three million, five hundred thirteen thousand, thirteen".