280214993 has 2 divisors, whose sum is σ = 280214994. Its totient is φ = 280214992.

The previous prime is 280214989. The next prime is 280214999. The reversal of 280214993 is 399412082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277988929 + 2226064 = 16673^2 + 1492^2 .

It is a cyclic number.

It is not a de Polignac number, because 280214993 - 2² = 280214989 is a prime.

It is not a weakly prime, because it can be changed into another prime (280214999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140107496 + 140107497.

It is an arithmetic number, because the mean of its divisors is an integer number (140107497).

Almost surely, 2^280214993 is an apocalyptic number.

It is an amenable number.

280214993 is a deficient number, since it is larger than the sum of its proper divisors (1).

280214993 is an equidigital number, since it uses as much as digits as its factorization.

280214993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 280214993 is about 16739.6234425987. The cubic root of 280214993 is about 654.3806611905.

The spelling of 280214993 in words is "two hundred eighty million, two hundred fourteen thousand, nine hundred ninety-three".