26427409 has 2 divisors, whose sum is σ = 26427410. Its totient is φ = 26427408.

The previous prime is 26427403. The next prime is 26427419. The reversal of 26427409 is 90472462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 6150400 = 4503^2 + 2480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26427409 is a prime.

It is equal to p_1649581 and since 26427409 and 1649581 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (26427403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13213704 + 13213705.

It is an arithmetic number, because the mean of its divisors is an integer number (13213705).

Almost surely, 2^26427409 is an apocalyptic number.

It is an amenable number.

26427409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26427409 is an equidigital number, since it uses as much as digits as its factorization.

26427409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 26427409 is about 5140.7595742264. The cubic root of 26427409 is about 297.8641220995.

The spelling of 26427409 in words is "twenty-six million, four hundred twenty-seven thousand, four hundred nine".