280742953 has 2 divisors, whose sum is σ = 280742954. Its totient is φ = 280742952.

The previous prime is 280742941. The next prime is 280742971. The reversal of 280742953 is 359247082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166616464 + 114126489 = 12908^2 + 10683^2 .

It is a cyclic number.

It is not a de Polignac number, because 280742953 - 2⁵ = 280742921 is a prime.

It is not a weakly prime, because it can be changed into another prime (280742983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140371476 + 140371477.

It is an arithmetic number, because the mean of its divisors is an integer number (140371477).

Almost surely, 2^280742953 is an apocalyptic number.

It is an amenable number.

280742953 is a deficient number, since it is larger than the sum of its proper divisors (1).

280742953 is an equidigital number, since it uses as much as digits as its factorization.

280742953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 280742953 is about 16755.3857908435. The cubic root of 280742953 is about 654.7913816126.

The spelling of 280742953 in words is "two hundred eighty million, seven hundred forty-two thousand, nine hundred fifty-three".