1990903463 has 2 divisors, whose sum is σ = 1990903464. Its totient is φ = 1990903462.

The previous prime is 1990903457. The next prime is 1990903471. The reversal of 1990903463 is 3643090991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1990903463 - 2⁶ = 1990903399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1990903763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995451731 + 995451732.

It is an arithmetic number, because the mean of its divisors is an integer number (995451732).

Almost surely, 2^1990903463 is an apocalyptic number.

1990903463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990903463 is an equidigital number, since it uses as much as digits as its factorization.

1990903463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 1990903463 is about 44619.5412683725. The cubic root of 1990903463 is about 1258.0079935175.

The spelling of 1990903463 in words is "one billion, nine hundred ninety million, nine hundred three thousand, four hundred sixty-three".