550999403 has 2 divisors, whose sum is σ = 550999404. Its totient is φ = 550999402.

The previous prime is 550999399. The next prime is 550999409. The reversal of 550999403 is 304999055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550999403 - 2² = 550999399 is a prime.

It is not a weakly prime, because it can be changed into another prime (550999409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275499701 + 275499702.

It is an arithmetic number, because the mean of its divisors is an integer number (275499702).

Almost surely, 2^550999403 is an apocalyptic number.

550999403 is a deficient number, since it is larger than the sum of its proper divisors (1).

550999403 is an equidigital number, since it uses as much as digits as its factorization.

550999403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 550999403 is about 23473.3764720800. The cubic root of 550999403 is about 819.8172322190.

The spelling of 550999403 in words is "five hundred fifty million, nine hundred ninety-nine thousand, four hundred three".