1206632813 has 2 divisors, whose sum is σ = 1206632814. Its totient is φ = 1206632812.

The previous prime is 1206632797. The next prime is 1206632839. The reversal of 1206632813 is 3182366021.

1206632813 = 24562² + 24563².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603340969 + 603291844 = 24563^2 + 24562^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206632813 - 2⁴ = 1206632797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206632813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206632213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603316406 + 603316407.

It is an arithmetic number, because the mean of its divisors is an integer number (603316407).

Almost surely, 2^1206632813 is an apocalyptic number.

1206632813 is the 24563-rd centered square number.

It is an amenable number.

1206632813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206632813 is an equidigital number, since it uses as much as digits as its factorization.

1206632813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1206632813 is about 34736.6206329862. The cubic root of 1206632813 is about 1064.6128661171.

Adding to 1206632813 its reverse (3182366021), we get a palindrome (4388998834).

The spelling of 1206632813 in words is "one billion, two hundred six million, six hundred thirty-two thousand, eight hundred thirteen".