826099621 has 2 divisors, whose sum is σ = 826099622. Its totient is φ = 826099620.

The previous prime is 826099601. The next prime is 826099633. The reversal of 826099621 is 126990628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733651396 + 92448225 = 27086^2 + 9615^2 .

It is a cyclic number.

It is not a de Polignac number, because 826099621 - 2²⁵ = 792545189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (826099601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413049810 + 413049811.

It is an arithmetic number, because the mean of its divisors is an integer number (413049811).

Almost surely, 2^826099621 is an apocalyptic number.

It is an amenable number.

826099621 is a deficient number, since it is larger than the sum of its proper divisors (1).

826099621 is an equidigital number, since it uses as much as digits as its factorization.

826099621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 826099621 is about 28741.9488030996. The cubic root of 826099621 is about 938.3052385005.

The spelling of 826099621 in words is "eight hundred twenty-six million, ninety-nine thousand, six hundred twenty-one".