280991003 has 2 divisors, whose sum is σ = 280991004. Its totient is φ = 280991002.

The previous prime is 280990993. The next prime is 280991017. The reversal of 280991003 is 300199082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280991003 - 2²⁸ = 12555547 is a prime.

It is not a weakly prime, because it can be changed into another prime (280991083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140495501 + 140495502.

It is an arithmetic number, because the mean of its divisors is an integer number (140495502).

Almost surely, 2^280991003 is an apocalyptic number.

280991003 is a deficient number, since it is larger than the sum of its proper divisors (1).

280991003 is an equidigital number, since it uses as much as digits as its factorization.

280991003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 280991003 is about 16762.7862540808. The cubic root of 280991003 is about 654.9841714801.

The spelling of 280991003 in words is "two hundred eighty million, nine hundred ninety-one thousand, three".