1231850887 has 2 divisors, whose sum is σ = 1231850888. Its totient is φ = 1231850886.

The previous prime is 1231850881. The next prime is 1231850899. The reversal of 1231850887 is 7880581321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231850887 - 2⁷ = 1231850759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231850881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615925443 + 615925444.

It is an arithmetic number, because the mean of its divisors is an integer number (615925444).

Almost surely, 2^1231850887 is an apocalyptic number.

1231850887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231850887 is an equidigital number, since it uses as much as digits as its factorization.

1231850887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 1231850887 is about 35097.7333598624. The cubic root of 1231850887 is about 1071.9784303482.

The spelling of 1231850887 in words is "one billion, two hundred thirty-one million, eight hundred fifty thousand, eight hundred eighty-seven".