550891903 has 2 divisors, whose sum is σ = 550891904. Its totient is φ = 550891902.

The previous prime is 550891897. The next prime is 550891931. The reversal of 550891903 is 309198055.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550891903 is a prime.

It is a super-2 number, since 2×550891903² = 606963777581922818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550891973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275445951 + 275445952.

It is an arithmetic number, because the mean of its divisors is an integer number (275445952).

Almost surely, 2^550891903 is an apocalyptic number.

550891903 is a deficient number, since it is larger than the sum of its proper divisors (1).

550891903 is an equidigital number, since it uses as much as digits as its factorization.

550891903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 550891903 is about 23471.0865321570. The cubic root of 550891903 is about 819.7639132958.

The spelling of 550891903 in words is "five hundred fifty million, eight hundred ninety-one thousand, nine hundred three".