1203607813 has 2 divisors, whose sum is σ = 1203607814. Its totient is φ = 1203607812.

The previous prime is 1203607807. The next prime is 1203607831. The reversal of 1203607813 is 3187063021.

Together with next prime (1203607831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197644449 + 5963364 = 34607^2 + 2442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203607813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203607513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601803906 + 601803907.

It is an arithmetic number, because the mean of its divisors is an integer number (601803907).

Almost surely, 2^1203607813 is an apocalyptic number.

It is an amenable number.

1203607813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203607813 is an equidigital number, since it uses as much as digits as its factorization.

1203607813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1203607813 is about 34693.0513647906. The cubic root of 1203607813 is about 1063.7224685191.

The spelling of 1203607813 in words is "one billion, two hundred three million, six hundred seven thousand, eight hundred thirteen".