64198949 has 2 divisors, whose sum is σ = 64198950. Its totient is φ = 64198948.

The previous prime is 64198913. The next prime is 64198969. The reversal of 64198949 is 94989146.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 6666724 = 7585^2 + 2582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64198949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64198897 and 64198906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64198969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32099474 + 32099475.

It is an arithmetic number, because the mean of its divisors is an integer number (32099475).

Almost surely, 2^64198949 is an apocalyptic number.

It is an amenable number.

64198949 is a deficient number, since it is larger than the sum of its proper divisors (1).

64198949 is an equidigital number, since it uses as much as digits as its factorization.

64198949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 64198949 is about 8012.4246642324. The cubic root of 64198949 is about 400.4140483454.

The spelling of 64198949 in words is "sixty-four million, one hundred ninety-eight thousand, nine hundred forty-nine".