26730631 has 2 divisors, whose sum is σ = 26730632. Its totient is φ = 26730630.

The previous prime is 26730617. The next prime is 26730637. The reversal of 26730631 is 13603762.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26730631 is a prime.

It is a super-2 number, since 2×26730631² = 1429053267316322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26730631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26730637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13365315 + 13365316.

It is an arithmetic number, because the mean of its divisors is an integer number (13365316).

Almost surely, 2^26730631 is an apocalyptic number.

26730631 is a deficient number, since it is larger than the sum of its proper divisors (1).

26730631 is an equidigital number, since it uses as much as digits as its factorization.

26730631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 26730631 is about 5170.1674054135. The cubic root of 26730631 is about 298.9990007535. Note that the first 3 decimals are identical.

The spelling of 26730631 in words is "twenty-six million, seven hundred thirty thousand, six hundred thirty-one".