826672421 has 2 divisors, whose sum is σ = 826672422. Its totient is φ = 826672420.

The previous prime is 826672411. The next prime is 826672439. The reversal of 826672421 is 124276628.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825700225 + 972196 = 28735^2 + 986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-826672421 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 (826672411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413336210 + 413336211.

It is an arithmetic number, because the mean of its divisors is an integer number (413336211).

Almost surely, 2^826672421 is an apocalyptic number.

It is an amenable number.

826672421 is a deficient number, since it is larger than the sum of its proper divisors (1).

826672421 is an equidigital number, since it uses as much as digits as its factorization.

826672421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 826672421 is about 28751.9116060133. The cubic root of 826672421 is about 938.5220553966.

The spelling of 826672421 in words is "eight hundred twenty-six million, six hundred seventy-two thousand, four hundred twenty-one".