263280973 has 2 divisors, whose sum is σ = 263280974. Its totient is φ = 263280972.

The previous prime is 263280943. The next prime is 263280991. The reversal of 263280973 is 379082362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238300969 + 24980004 = 15437^2 + 4998^2 .

It is a cyclic number.

It is not a de Polignac number, because 263280973 - 2²¹ = 261183821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263280943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131640486 + 131640487.

It is an arithmetic number, because the mean of its divisors is an integer number (131640487).

Almost surely, 2^263280973 is an apocalyptic number.

It is an amenable number.

263280973 is a deficient number, since it is larger than the sum of its proper divisors (1).

263280973 is an equidigital number, since it uses as much as digits as its factorization.

263280973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 263280973 is about 16225.9351964686. The cubic root of 263280973 is about 640.9239365125.

The spelling of 263280973 in words is "two hundred sixty-three million, two hundred eighty thousand, nine hundred seventy-three".