1238906873 has 2 divisors, whose sum is σ = 1238906874. Its totient is φ = 1238906872.

The previous prime is 1238906869. The next prime is 1238906917. The reversal of 1238906873 is 3786098321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954377449 + 284529424 = 30893^2 + 16868^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238906873 - 2² = 1238906869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1238906813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619453436 + 619453437.

It is an arithmetic number, because the mean of its divisors is an integer number (619453437).

Almost surely, 2^1238906873 is an apocalyptic number.

It is an amenable number.

1238906873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238906873 is an equidigital number, since it uses as much as digits as its factorization.

1238906873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1238906873 is about 35198.1089406803. The cubic root of 1238906873 is about 1074.0212827837.

The spelling of 1238906873 in words is "one billion, two hundred thirty-eight million, nine hundred six thousand, eight hundred seventy-three".