26377997 has 2 divisors, whose sum is σ = 26377998. Its totient is φ = 26377996.

The previous prime is 26377979. The next prime is 26378017. The reversal of 26377997 is 79977362.

Together with previous prime (26377979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25110121 + 1267876 = 5011^2 + 1126^2 .

It is a cyclic number.

It is not a de Polignac number, because 26377997 - 2¹⁸ = 26115853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26377937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13188998 + 13188999.

It is an arithmetic number, because the mean of its divisors is an integer number (13188999).

Almost surely, 2^26377997 is an apocalyptic number.

It is an amenable number.

26377997 is a deficient number, since it is larger than the sum of its proper divisors (1).

26377997 is an equidigital number, since it uses as much as digits as its factorization.

26377997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 50.

The square root of 26377997 is about 5135.9514211098. The cubic root of 26377997 is about 297.6783649000.

The spelling of 26377997 in words is "twenty-six million, three hundred seventy-seven thousand, nine hundred ninety-seven".