67963921 has 2 divisors, whose sum is σ = 67963922. Its totient is φ = 67963920.

The previous prime is 67963913. The next prime is 67963981. The reversal of 67963921 is 12936976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62964225 + 4999696 = 7935^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 67963921 - 2³ = 67963913 is a prime.

It is not a weakly prime, because it can be changed into another prime (67963981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33981960 + 33981961.

It is an arithmetic number, because the mean of its divisors is an integer number (33981961).

Almost surely, 2^67963921 is an apocalyptic number.

It is an amenable number.

67963921 is a deficient number, since it is larger than the sum of its proper divisors (1).

67963921 is an equidigital number, since it uses as much as digits as its factorization.

67963921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 67963921 is about 8244.0233502823. The cubic root of 67963921 is about 408.0933101493.

The spelling of 67963921 in words is "sixty-seven million, nine hundred sixty-three thousand, nine hundred twenty-one".