26989401349 has 2 divisors, whose sum is σ = 26989401350. Its totient is φ = 26989401348.

The previous prime is 26989401337. The next prime is 26989401353. The reversal of 26989401349 is 94310498962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20855692225 + 6133709124 = 144415^2 + 78318^2 .

It is a cyclic number.

It is not a de Polignac number, because 26989401349 - 2¹⁷ = 26989270277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26989401349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26989401149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13494700674 + 13494700675.

It is an arithmetic number, because the mean of its divisors is an integer number (13494700675).

Almost surely, 2^26989401349 is an apocalyptic number.

It is an amenable number.

26989401349 is a deficient number, since it is larger than the sum of its proper divisors (1).

26989401349 is an equidigital number, since it uses as much as digits as its factorization.

26989401349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 26989401349 in words is "twenty-six billion, nine hundred eighty-nine million, four hundred one thousand, three hundred forty-nine".