67398949 has 2 divisors, whose sum is σ = 67398950. Its totient is φ = 67398948.

The previous prime is 67398943. The next prime is 67398953. The reversal of 67398949 is 94989376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67354849 + 44100 = 8207^2 + 210^2 .

It is a cyclic number.

It is not a de Polignac number, because 67398949 - 2⁹ = 67398437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67398949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67398943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33699474 + 33699475.

It is an arithmetic number, because the mean of its divisors is an integer number (33699475).

Almost surely, 2^67398949 is an apocalyptic number.

It is an amenable number.

67398949 is a deficient number, since it is larger than the sum of its proper divisors (1).

67398949 is an equidigital number, since it uses as much as digits as its factorization.

67398949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 67398949 is about 8209.6862912050. The cubic root of 67398949 is about 406.9593598179.

The spelling of 67398949 in words is "sixty-seven million, three hundred ninety-eight thousand, nine hundred forty-nine".