280997001 has 24 divisors (see below), whose sum is σ = 410646600. Its totient is φ = 185147136.

The previous prime is 280996993. The next prime is 280997021. The reversal of 280997001 is 100799082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46172025 + 234824976 = 6795^2 + 15324^2 .

It is not a de Polignac number, because 280997001 - 2³ = 280996993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280997021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 429991 + ... + 430643.

It is an arithmetic number, because the mean of its divisors is an integer number (17110275).

Almost surely, 2^280997001 is an apocalyptic number.

It is an amenable number.

280997001 is a deficient number, since it is larger than the sum of its proper divisors (129649599).

280997001 is a wasteful number, since it uses less digits than its factorization.

280997001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 280997001 is about 16762.9651613311. The cubic root of 280997001 is about 654.9888318512.

The spelling of 280997001 in words is "two hundred eighty million, nine hundred ninety-seven thousand, one".