990990103 has 2 divisors, whose sum is σ = 990990104. Its totient is φ = 990990102.

The previous prime is 990990073. The next prime is 990990107. The reversal of 990990103 is 301099099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990990103 - 2⁵ = 990990071 is a prime.

It is a super-2 number, since 2×990990103² = 1964122768487901218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990990107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495495051 + 495495052.

It is an arithmetic number, because the mean of its divisors is an integer number (495495052).

Almost surely, 2^990990103 is an apocalyptic number.

990990103 is a deficient number, since it is larger than the sum of its proper divisors (1).

990990103 is an equidigital number, since it uses as much as digits as its factorization.

990990103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 990990103 is about 31479.9952827188. The cubic root of 990990103 is about 996.9876357735.

The spelling of 990990103 in words is "nine hundred ninety million, nine hundred ninety thousand, one hundred three".