67879949 has 2 divisors, whose sum is σ = 67879950. Its totient is φ = 67879948.

The previous prime is 67879943. The next prime is 67879957. The reversal of 67879949 is 94997876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59136100 + 8743849 = 7690^2 + 2957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67879949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67879943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33939974 + 33939975.

It is an arithmetic number, because the mean of its divisors is an integer number (33939975).

Almost surely, 2^67879949 is an apocalyptic number.

It is an amenable number.

67879949 is a deficient number, since it is larger than the sum of its proper divisors (1).

67879949 is an equidigital number, since it uses as much as digits as its factorization.

67879949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 59.

The square root of 67879949 is about 8238.9288745564. The cubic root of 67879949 is about 407.9251692988.

The spelling of 67879949 in words is "sixty-seven million, eight hundred seventy-nine thousand, nine hundred forty-nine".