26231993 has 2 divisors, whose sum is σ = 26231994. Its totient is φ = 26231992.

The previous prime is 26231963. The next prime is 26231999. The reversal of 26231993 is 39913262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 150544 = 5107^2 + 388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26231993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26231999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13115996 + 13115997.

It is an arithmetic number, because the mean of its divisors is an integer number (13115997).

Almost surely, 2^26231993 is an apocalyptic number.

It is an amenable number.

26231993 is a deficient number, since it is larger than the sum of its proper divisors (1).

26231993 is an equidigital number, since it uses as much as digits as its factorization.

26231993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 35.

The square root of 26231993 is about 5121.7177782459. The cubic root of 26231993 is about 297.1281251391.

The spelling of 26231993 in words is "twenty-six million, two hundred thirty-one thousand, nine hundred ninety-three".