67940057 has 2 divisors, whose sum is σ = 67940058. Its totient is φ = 67940056.

The previous prime is 67940009. The next prime is 67940063. The reversal of 67940057 is 75004976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67584841 + 355216 = 8221^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 67940057 - 2²⁴ = 51162841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67940057.

It is not a weakly prime, because it can be changed into another prime (67940357) 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, 33970028 + 33970029.

It is an arithmetic number, because the mean of its divisors is an integer number (33970029).

Almost surely, 2^67940057 is an apocalyptic number.

It is an amenable number.

67940057 is a deficient number, since it is larger than the sum of its proper divisors (1).

67940057 is an equidigital number, since it uses as much as digits as its factorization.

67940057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 67940057 is about 8242.5758716557. The cubic root of 67940057 is about 408.0455402999.

The spelling of 67940057 in words is "sixty-seven million, nine hundred forty thousand, fifty-seven".