238990306873 has 2 divisors, whose sum is σ = 238990306874. Its totient is φ = 238990306872.

The previous prime is 238990306843. The next prime is 238990306889. The reversal of 238990306873 is 378603099832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166571729424 + 72418577449 = 408132^2 + 269107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238990306873 is a prime.

It is a super-2 number, since 2×238990306873² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (238990306843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119495153436 + 119495153437.

It is an arithmetic number, because the mean of its divisors is an integer number (119495153437).

Almost surely, 2^238990306873 is an apocalyptic number.

It is an amenable number.

238990306873 is a deficient number, since it is larger than the sum of its proper divisors (1).

238990306873 is an equidigital number, since it uses as much as digits as its factorization.

238990306873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 58.

The spelling of 238990306873 in words is "two hundred thirty-eight billion, nine hundred ninety million, three hundred six thousand, eight hundred seventy-three".