67921963 has 2 divisors, whose sum is σ = 67921964. Its totient is φ = 67921962.

The previous prime is 67921957. The next prime is 67921999. The reversal of 67921963 is 36912976.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67921963 is a prime.

It is a super-2 number, since 2×67921963² = 9226786115546738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (67921943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33960981 + 33960982.

It is an arithmetic number, because the mean of its divisors is an integer number (33960982).

Almost surely, 2^67921963 is an apocalyptic number.

67921963 is a deficient number, since it is larger than the sum of its proper divisors (1).

67921963 is an equidigital number, since it uses as much as digits as its factorization.

67921963 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 67921963 is about 8241.4782047883. The cubic root of 67921963 is about 408.0093131124.

The spelling of 67921963 in words is "sixty-seven million, nine hundred twenty-one thousand, nine hundred sixty-three".