67858949 has 2 divisors, whose sum is σ = 67858950. Its totient is φ = 67858948.

The previous prime is 67858943. The next prime is 67858963. The reversal of 67858949 is 94985876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67354849 + 504100 = 8207^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 67858949 - 2²⁴ = 51081733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 67858894 and 67858903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67858943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33929474 + 33929475.

It is an arithmetic number, because the mean of its divisors is an integer number (33929475).

Almost surely, 2^67858949 is an apocalyptic number.

It is an amenable number.

67858949 is a deficient number, since it is larger than the sum of its proper divisors (1).

67858949 is an equidigital number, since it uses as much as digits as its factorization.

67858949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The square root of 67858949 is about 8237.6543384631. The cubic root of 67858949 is about 407.8830983965.

The spelling of 67858949 in words is "sixty-seven million, eight hundred fifty-eight thousand, nine hundred forty-nine".