788652421 has 2 divisors, whose sum is σ = 788652422. Its totient is φ = 788652420.

The previous prime is 788652409. The next prime is 788652443. The reversal of 788652421 is 124256887.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 751308100 + 37344321 = 27410^2 + 6111^2 .

It is a cyclic number.

It is not a de Polignac number, because 788652421 - 2⁹ = 788651909 is a prime.

It is a super-2 number, since 2×788652421² = 1243945282298322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788652461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394326210 + 394326211.

It is an arithmetic number, because the mean of its divisors is an integer number (394326211).

Almost surely, 2^788652421 is an apocalyptic number.

It is an amenable number.

788652421 is a deficient number, since it is larger than the sum of its proper divisors (1).

788652421 is an equidigital number, since it uses as much as digits as its factorization.

788652421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 43.

The square root of 788652421 is about 28082.9560587912. The cubic root of 788652421 is about 923.9076156362.

The spelling of 788652421 in words is "seven hundred eighty-eight million, six hundred fifty-two thousand, four hundred twenty-one".