1239630461 has 2 divisors, whose sum is σ = 1239630462. Its totient is φ = 1239630460.

The previous prime is 1239630451. The next prime is 1239630487. The reversal of 1239630461 is 1640369321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197575236 + 42055225 = 34606^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239630461 - 2⁶ = 1239630397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1239630401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619815230 + 619815231.

It is an arithmetic number, because the mean of its divisors is an integer number (619815231).

Almost surely, 2^1239630461 is an apocalyptic number.

It is an amenable number.

1239630461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239630461 is an equidigital number, since it uses as much as digits as its factorization.

1239630461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 1239630461 is about 35208.3862311240. The cubic root of 1239630461 is about 1074.2303374159.

Adding to 1239630461 its reverse (1640369321), we get a palindrome (2879999782).

The spelling of 1239630461 in words is "one billion, two hundred thirty-nine million, six hundred thirty thousand, four hundred sixty-one".