263680379 has 2 divisors, whose sum is σ = 263680380. Its totient is φ = 263680378.

The previous prime is 263680331. The next prime is 263680493. The reversal of 263680379 is 973086362.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263680379 is a prime.

It is not a weakly prime, because it can be changed into another prime (263680279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131840189 + 131840190.

It is an arithmetic number, because the mean of its divisors is an integer number (131840190).

Almost surely, 2^263680379 is an apocalyptic number.

263680379 is a deficient number, since it is larger than the sum of its proper divisors (1).

263680379 is an equidigital number, since it uses as much as digits as its factorization.

263680379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 263680379 is about 16238.2381741370. The cubic root of 263680379 is about 641.2478737420.

The spelling of 263680379 in words is "two hundred sixty-three million, six hundred eighty thousand, three hundred seventy-nine".