26490643 has 2 divisors, whose sum is σ = 26490644. Its totient is φ = 26490642.

The previous prime is 26490599. The next prime is 26490649. The reversal of 26490643 is 34609462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26490643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26490599 and 26490608.

It is not a weakly prime, because it can be changed into another prime (26490649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13245321 + 13245322.

It is an arithmetic number, because the mean of its divisors is an integer number (13245322).

Almost surely, 2^26490643 is an apocalyptic number.

26490643 is a deficient number, since it is larger than the sum of its proper divisors (1).

26490643 is an equidigital number, since it uses as much as digits as its factorization.

26490643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 26490643 is about 5146.9061580721. The cubic root of 26490643 is about 298.1015036413.

The spelling of 26490643 in words is "twenty-six million, four hundred ninety thousand, six hundred forty-three".