1205479631 has 2 divisors, whose sum is σ = 1205479632. Its totient is φ = 1205479630.

The previous prime is 1205479591. The next prime is 1205479651. The reversal of 1205479631 is 1369745021.

It is a strong prime.

It is an emirp because it is prime and its reverse (1369745021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205479631 is a prime.

It is a super-2 number, since 2×1205479631² = 2906362281511792322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205479651) 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 as a sum of consecutive naturals, namely, 602739815 + 602739816.

It is an arithmetic number, because the mean of its divisors is an integer number (602739816).

Almost surely, 2^1205479631 is an apocalyptic number.

1205479631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205479631 is an equidigital number, since it uses as much as digits as its factorization.

1205479631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1205479631 is about 34720.0177275300. The cubic root of 1205479631 is about 1064.2736069568.

The spelling of 1205479631 in words is "one billion, two hundred five million, four hundred seventy-nine thousand, six hundred thirty-one".