280258961 has 4 divisors (see below), whose sum is σ = 280410624. Its totient is φ = 280107300.

The previous prime is 280258919. The next prime is 280258969. The reversal of 280258961 is 169852082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 169852082 = 2 ⋅84926041.

It is a cyclic number.

It is not a de Polignac number, because 280258961 - 2⁶ = 280258897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280258969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73025 + ... + 76766.

It is an arithmetic number, because the mean of its divisors is an integer number (70102656).

Almost surely, 2^280258961 is an apocalyptic number.

It is an amenable number.

280258961 is a deficient number, since it is larger than the sum of its proper divisors (151663).

280258961 is a wasteful number, since it uses less digits than its factorization.

280258961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151662.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 280258961 is about 16740.9366822768. The cubic root of 280258961 is about 654.4148852743.

The spelling of 280258961 in words is "two hundred eighty million, two hundred fifty-eight thousand, nine hundred sixty-one".