107664421 has 2 divisors, whose sum is σ = 107664422. Its totient is φ = 107664420.

The previous prime is 107664419. The next prime is 107664437. The reversal of 107664421 is 124466701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56040196 + 51624225 = 7486^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 107664421 - 2¹ = 107664419 is a prime.

Together with 107664419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (107644421) 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, 53832210 + 53832211.

It is an arithmetic number, because the mean of its divisors is an integer number (53832211).

Almost surely, 2^107664421 is an apocalyptic number.

It is an amenable number.

107664421 is a deficient number, since it is larger than the sum of its proper divisors (1).

107664421 is an equidigital number, since it uses as much as digits as its factorization.

107664421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 107664421 is about 10376.1467318075. The cubic root of 107664421 is about 475.7265645276.

The spelling of 107664421 in words is "one hundred seven million, six hundred sixty-four thousand, four hundred twenty-one".