1231477963 has 2 divisors, whose sum is σ = 1231477964. Its totient is φ = 1231477962.

The previous prime is 1231477931. The next prime is 1231477969. The reversal of 1231477963 is 3697741321.

It is a strong prime.

It is an emirp because it is prime and its reverse (3697741321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231477963 - 2⁵ = 1231477931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231477969) 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, 615738981 + 615738982.

It is an arithmetic number, because the mean of its divisors is an integer number (615738982).

Almost surely, 2^1231477963 is an apocalyptic number.

1231477963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231477963 is an equidigital number, since it uses as much as digits as its factorization.

1231477963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 1231477963 is about 35092.4203069552. The cubic root of 1231477963 is about 1071.8702444099.

The spelling of 1231477963 in words is "one billion, two hundred thirty-one million, four hundred seventy-seven thousand, nine hundred sixty-three".