826620001 has 3 divisors (see below), whose sum is σ = 826648753. Its totient is φ = 826591250.

The previous prime is 826619971. The next prime is 826620007. The reversal of 826620001 is 100026628.

The square root of 826620001 is 28751.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 826620001 - 2⁷ = 826619873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (826620007) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14376 + ... + 43126.

Almost surely, 2^826620001 is an apocalyptic number.

826620001 is the 28751-st square number.

826620001 is the 14376-th centered octagonal number.

It is an amenable number.

826620001 is a deficient number, since it is larger than the sum of its proper divisors (28752).

826620001 is an frugal number, since it uses more digits than its factorization.

826620001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57502 (or 28751 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The cubic root of 826620001 is about 938.5022174838.

Multiplying 826620001 by its sum of digits (25), we get a square (20665500025 = 143755²).

Adding to 826620001 its reverse (100026628), we get a palindrome (926646629).

The spelling of 826620001 in words is "eight hundred twenty-six million, six hundred twenty thousand, one".