26219997 has 8 divisors (see below), whose sum is σ = 38844480. Its totient is φ = 17479980.

The previous prime is 26219993. The next prime is 26220011. The reversal of 26219997 is 79991262.

It is not a de Polignac number, because 26219997 - 2² = 26219993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26219993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485529 + ... + 485582.

It is an arithmetic number, because the mean of its divisors is an integer number (4855560).

Almost surely, 2^26219997 is an apocalyptic number.

26219997 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

26219997 is a deficient number, since it is larger than the sum of its proper divisors (12624483).

26219997 is an equidigital number, since it uses as much as digits as its factorization.

26219997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971120 (or 971114 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 26219997 is about 5120.5465528594. The cubic root of 26219997 is about 297.0828255889.

The spelling of 26219997 in words is "twenty-six million, two hundred nineteen thousand, nine hundred ninety-seven".