262563491 has 2 divisors, whose sum is σ = 262563492. Its totient is φ = 262563490.

The previous prime is 262563473. The next prime is 262563541. The reversal of 262563491 is 194365262.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-262563491 is a prime.

It is a super-2 number, since 2×262563491² = 137879173612214162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (262568491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131281745 + 131281746.

It is an arithmetic number, because the mean of its divisors is an integer number (131281746).

Almost surely, 2^262563491 is an apocalyptic number.

262563491 is a deficient number, since it is larger than the sum of its proper divisors (1).

262563491 is an equidigital number, since it uses as much as digits as its factorization.

262563491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 262563491 is about 16203.8110023537. The cubic root of 262563491 is about 640.3412007144.

The spelling of 262563491 in words is "two hundred sixty-two million, five hundred sixty-three thousand, four hundred ninety-one".