26699999 has 2 divisors, whose sum is σ = 26700000. Its totient is φ = 26699998.

The previous prime is 26699983. The next prime is 26700007. The reversal of 26699999 is 99999662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26699999 - 2⁴ = 26699983 is a prime.

It is a Chen prime.

26699999 is a modest number, since divided by 9999 gives 2669 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26699909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13349999 + 13350000.

It is an arithmetic number, because the mean of its divisors is an integer number (13350000).

Almost surely, 2^26699999 is an apocalyptic number.

26699999 is a deficient number, since it is larger than the sum of its proper divisors (1).

26699999 is an equidigital number, since it uses as much as digits as its factorization.

26699999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4251528, while the sum is 59.

The square root of 26699999 is about 5167.2041763414. The cubic root of 26699999 is about 298.8847443388.

The spelling of 26699999 in words is "twenty-six million, six hundred ninety-nine thousand, nine hundred ninety-nine".