203678908361 has 2 divisors, whose sum is σ = 203678908362. Its totient is φ = 203678908360.

The previous prime is 203678908351. The next prime is 203678908379. The reversal of 203678908361 is 163809876302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203658151225 + 20757136 = 451285^2 + 4556^2 .

It is a cyclic number.

It is not a de Polignac number, because 203678908361 - 2²⁶ = 203611799497 is a prime.

It is a super-2 number, since 2×203678908361² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203678908351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101839454180 + 101839454181.

It is an arithmetic number, because the mean of its divisors is an integer number (101839454181).

Almost surely, 2^203678908361 is an apocalyptic number.

It is an amenable number.

203678908361 is a deficient number, since it is larger than the sum of its proper divisors (1).

203678908361 is an equidigital number, since it uses as much as digits as its factorization.

203678908361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 203678908361 in words is "two hundred three billion, six hundred seventy-eight million, nine hundred eight thousand, three hundred sixty-one".