1231950893 has 2 divisors, whose sum is σ = 1231950894. Its totient is φ = 1231950892.

The previous prime is 1231950859. The next prime is 1231950913. The reversal of 1231950893 is 3980591321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100779684 + 131171209 = 33178^2 + 11453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231950893 - 2¹² = 1231946797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231950893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231950803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615975446 + 615975447.

It is an arithmetic number, because the mean of its divisors is an integer number (615975447).

Almost surely, 2^1231950893 is an apocalyptic number.

It is an amenable number.

1231950893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231950893 is an equidigital number, since it uses as much as digits as its factorization.

1231950893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1231950893 is about 35099.1580098441. The cubic root of 1231950893 is about 1072.0074385599.

The spelling of 1231950893 in words is "one billion, two hundred thirty-one million, nine hundred fifty thousand, eight hundred ninety-three".