263001491 has 2 divisors, whose sum is σ = 263001492. Its totient is φ = 263001490.

The previous prime is 263001469. The next prime is 263001521. The reversal of 263001491 is 194100362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263001491 - 2²² = 258807187 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263001491.

It is not a weakly prime, because it can be changed into another prime (263001091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131500745 + 131500746.

It is an arithmetic number, because the mean of its divisors is an integer number (131500746).

Almost surely, 2^263001491 is an apocalyptic number.

263001491 is a deficient number, since it is larger than the sum of its proper divisors (1).

263001491 is an equidigital number, since it uses as much as digits as its factorization.

263001491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 263001491 is about 16217.3207096610. The cubic root of 263001491 is about 640.6970684609.

The spelling of 263001491 in words is "two hundred sixty-three million, one thousand, four hundred ninety-one".