26878693 has 2 divisors, whose sum is σ = 26878694. Its totient is φ = 26878692.

The previous prime is 26878627. The next prime is 26878699. The reversal of 26878693 is 39687862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14607684 + 12271009 = 3822^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 26878693 - 2²¹ = 24781541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26878699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13439346 + 13439347.

It is an arithmetic number, because the mean of its divisors is an integer number (13439347).

Almost surely, 2^26878693 is an apocalyptic number.

It is an amenable number.

26878693 is a deficient number, since it is larger than the sum of its proper divisors (1).

26878693 is an equidigital number, since it uses as much as digits as its factorization.

26878693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 26878693 is about 5184.4665106450. The cubic root of 26878693 is about 299.5500402730.

It can be divided in two parts, 268 and 78693, that added together give a square (78961 = 281²).

The spelling of 26878693 in words is "twenty-six million, eight hundred seventy-eight thousand, six hundred ninety-three".