768372421 has 2 divisors, whose sum is σ = 768372422. Its totient is φ = 768372420.

The previous prime is 768372413. The next prime is 768372427. The reversal of 768372421 is 124273867.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 754600900 + 13771521 = 27470^2 + 3711^2 .

It is a cyclic number.

It is not a de Polignac number, because 768372421 - 2³ = 768372413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (768372427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384186210 + 384186211.

It is an arithmetic number, because the mean of its divisors is an integer number (384186211).

Almost surely, 2^768372421 is an apocalyptic number.

It is an amenable number.

768372421 is a deficient number, since it is larger than the sum of its proper divisors (1).

768372421 is an equidigital number, since it uses as much as digits as its factorization.

768372421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 768372421 is about 27719.5313993581. The cubic root of 768372421 is about 915.9193963799.

The spelling of 768372421 in words is "seven hundred sixty-eight million, three hundred seventy-two thousand, four hundred twenty-one".