1231930247 has 2 divisors, whose sum is σ = 1231930248. Its totient is φ = 1231930246.

The previous prime is 1231930223. The next prime is 1231930253. The reversal of 1231930247 is 7420391321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231930247 - 2⁸ = 1231929991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231930267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615965123 + 615965124.

It is an arithmetic number, because the mean of its divisors is an integer number (615965124).

Almost surely, 2^1231930247 is an apocalyptic number.

1231930247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231930247 is an equidigital number, since it uses as much as digits as its factorization.

1231930247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1231930247 is about 35098.8638989925. The cubic root of 1231930247 is about 1072.0014500124.

The spelling of 1231930247 in words is "one billion, two hundred thirty-one million, nine hundred thirty thousand, two hundred forty-seven".