203112989 has 2 divisors, whose sum is σ = 203112990. Its totient is φ = 203112988.

The previous prime is 203112971. The next prime is 203113003. The reversal of 203112989 is 989211302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200364025 + 2748964 = 14155^2 + 1658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203112989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203112089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556494 + 101556495.

It is an arithmetic number, because the mean of its divisors is an integer number (101556495).

Almost surely, 2^203112989 is an apocalyptic number.

It is an amenable number.

203112989 is a deficient number, since it is larger than the sum of its proper divisors (1).

203112989 is an equidigital number, since it uses as much as digits as its factorization.

203112989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 203112989 is about 14251.7714337552. The cubic root of 203112989 is about 587.8220852891.

The spelling of 203112989 in words is "two hundred three million, one hundred twelve thousand, nine hundred eighty-nine".