67213961 has 2 divisors, whose sum is σ = 67213962. Its totient is φ = 67213960.

The previous prime is 67213897. The next prime is 67213969. The reversal of 67213961 is 16931276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52345225 + 14868736 = 7235^2 + 3856^2 .

It is a cyclic number.

It is not a de Polignac number, because 67213961 - 2⁶ = 67213897 is a prime.

It is not a weakly prime, because it can be changed into another prime (67213969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33606980 + 33606981.

It is an arithmetic number, because the mean of its divisors is an integer number (33606981).

Almost surely, 2^67213961 is an apocalyptic number.

It is an amenable number.

67213961 is a deficient number, since it is larger than the sum of its proper divisors (1).

67213961 is an equidigital number, since it uses as much as digits as its factorization.

67213961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 67213961 is about 8198.4121023525. The cubic root of 67213961 is about 406.5866953588.

The spelling of 67213961 in words is "sixty-seven million, two hundred thirteen thousand, nine hundred sixty-one".