1203664513 has 4 divisors (see below), whose sum is σ = 1203742000. Its totient is φ = 1203587028.

The previous prime is 1203664453. The next prime is 1203664529. The reversal of 1203664513 is 3154663021.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203664513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203667513) 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, 6495 + ... + 49492.

It is an arithmetic number, because the mean of its divisors is an integer number (300935500).

Almost surely, 2^1203664513 is an apocalyptic number.

It is an amenable number.

1203664513 is a deficient number, since it is larger than the sum of its proper divisors (77487).

1203664513 is an equidigital number, since it uses as much as digits as its factorization.

1203664513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77486.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1203664513 is about 34693.8685216855. The cubic root of 1203664513 is about 1063.7391716667.

The spelling of 1203664513 in words is "one billion, two hundred three million, six hundred sixty-four thousand, five hundred thirteen".