67621963 has 2 divisors, whose sum is σ = 67621964. Its totient is φ = 67621962.

The previous prime is 67621927. The next prime is 67621973. The reversal of 67621963 is 36912676.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67621963 - 2⁹ = 67621451 is a prime.

It is not a weakly prime, because it can be changed into another prime (67621973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33810981 + 33810982.

It is an arithmetic number, because the mean of its divisors is an integer number (33810982).

Almost surely, 2^67621963 is an apocalyptic number.

67621963 is a deficient number, since it is larger than the sum of its proper divisors (1).

67621963 is an equidigital number, since it uses as much as digits as its factorization.

67621963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 67621963 is about 8223.2574445897. The cubic root of 67621963 is about 407.4077234697.

The spelling of 67621963 in words is "sixty-seven million, six hundred twenty-one thousand, nine hundred sixty-three".