280628983 has 2 divisors, whose sum is σ = 280628984. Its totient is φ = 280628982.

The previous prime is 280628981. The next prime is 280628989. The reversal of 280628983 is 389826082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280628983 - 2¹ = 280628981 is a prime.

It is a super-2 number, since 2×280628983² = 157505252199228578, which contains 22 as substring.

Together with 280628981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280628981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140314491 + 140314492.

It is an arithmetic number, because the mean of its divisors is an integer number (140314492).

Almost surely, 2^280628983 is an apocalyptic number.

280628983 is a deficient number, since it is larger than the sum of its proper divisors (1).

280628983 is an equidigital number, since it uses as much as digits as its factorization.

280628983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 280628983 is about 16751.9844496107. The cubic root of 280628983 is about 654.7027635682.

The spelling of 280628983 in words is "two hundred eighty million, six hundred twenty-eight thousand, nine hundred eighty-three".