203863402949 has 2 divisors, whose sum is σ = 203863402950. Its totient is φ = 203863402948.

The previous prime is 203863402931. The next prime is 203863402957. The reversal of 203863402949 is 949204368302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203861280100 + 2122849 = 451510^2 + 1457^2 .

It is a cyclic number.

It is not a de Polignac number, because 203863402949 - 2¹² = 203863398853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203863402897 and 203863402906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203863402969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101931701474 + 101931701475.

It is an arithmetic number, because the mean of its divisors is an integer number (101931701475).

Almost surely, 2^203863402949 is an apocalyptic number.

It is an amenable number.

203863402949 is a deficient number, since it is larger than the sum of its proper divisors (1).

203863402949 is an equidigital number, since it uses as much as digits as its factorization.

203863402949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 203863402949 in words is "two hundred three billion, eight hundred sixty-three million, four hundred two thousand, nine hundred forty-nine".