280500061 has 2 divisors, whose sum is σ = 280500062. Its totient is φ = 280500060.

The previous prime is 280500053. The next prime is 280500083. The reversal of 280500061 is 160005082.

It is a happy number.

It is an a-pointer prime, because the next prime (280500083) can be obtained adding 280500061 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259016836 + 21483225 = 16094^2 + 4635^2 .

It is a cyclic number.

It is not a de Polignac number, because 280500061 - 2³ = 280500053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280500461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140250030 + 140250031.

It is an arithmetic number, because the mean of its divisors is an integer number (140250031).

Almost surely, 2^280500061 is an apocalyptic number.

It is an amenable number.

280500061 is a deficient number, since it is larger than the sum of its proper divisors (1).

280500061 is an equidigital number, since it uses as much as digits as its factorization.

280500061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 280500061 is about 16748.1360455425. The cubic root of 280500061 is about 654.6024905820.

The spelling of 280500061 in words is "two hundred eighty million, five hundred thousand, sixty-one".