1231304479 has 2 divisors, whose sum is σ = 1231304480. Its totient is φ = 1231304478.

The previous prime is 1231304461. The next prime is 1231304483. The reversal of 1231304479 is 9744031321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231304479 - 2⁹ = 1231303967 is a prime.

It is a super-2 number, since 2×1231304479² = 3032221440010922882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231304279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615652239 + 615652240.

It is an arithmetic number, because the mean of its divisors is an integer number (615652240).

Almost surely, 2^1231304479 is an apocalyptic number.

1231304479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231304479 is an equidigital number, since it uses as much as digits as its factorization.

1231304479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1231304479 is about 35089.9484040658. The cubic root of 1231304479 is about 1071.8199089389.

The spelling of 1231304479 in words is "one billion, two hundred thirty-one million, three hundred four thousand, four hundred seventy-nine".