67677949 has 2 divisors, whose sum is σ = 67677950. Its totient is φ = 67677948.

The previous prime is 67677947. The next prime is 67677977. The reversal of 67677949 is 94977676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 20412324 = 6875^2 + 4518^2 .

It is a cyclic number.

It is not a de Polignac number, because 67677949 - 2¹ = 67677947 is a prime.

Together with 67677947, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 67677949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67677941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33838974 + 33838975.

It is an arithmetic number, because the mean of its divisors is an integer number (33838975).

Almost surely, 2^67677949 is an apocalyptic number.

It is an amenable number.

67677949 is a deficient number, since it is larger than the sum of its proper divisors (1).

67677949 is an equidigital number, since it uses as much as digits as its factorization.

67677949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 55.

The square root of 67677949 is about 8226.6608657462. The cubic root of 67677949 is about 407.5201269746.

The spelling of 67677949 in words is "sixty-seven million, six hundred seventy-seven thousand, nine hundred forty-nine".