1213300403 has 4 divisors (see below), whose sum is σ = 1386629040. Its totient is φ = 1039971768.

The previous prime is 1213300397. The next prime is 1213300409. The reversal of 1213300403 is 3040033121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3040033121 = 571 ⋅5324051.

It is an interprime number because it is at equal distance from previous prime (1213300397) and next prime (1213300409).

It is a cyclic number.

It is not a de Polignac number, because 1213300403 - 2¹⁰ = 1213299379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213300409) 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, 86664308 + ... + 86664321.

It is an arithmetic number, because the mean of its divisors is an integer number (346657260).

Almost surely, 2^1213300403 is an apocalyptic number.

1213300403 is a deficient number, since it is larger than the sum of its proper divisors (173328637).

1213300403 is an equidigital number, since it uses as much as digits as its factorization.

1213300403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173328636.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1213300403 is about 34832.4619141398. The cubic root of 1213300403 is about 1066.5702048294.

Adding to 1213300403 its reverse (3040033121), we get a palindrome (4253333524).

The spelling of 1213300403 in words is "one billion, two hundred thirteen million, three hundred thousand, four hundred three".