64455949 has 2 divisors, whose sum is σ = 64455950. Its totient is φ = 64455948.

The previous prime is 64455917. The next prime is 64455973. The reversal of 64455949 is 94955446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 4284900 = 7757^2 + 2070^2 .

It is a cyclic number.

It is not a de Polignac number, because 64455949 - 2⁵ = 64455917 is a prime.

It is a super-2 number, since 2×64455949² = 8309138722981202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64455899 and 64455908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64455749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32227974 + 32227975.

It is an arithmetic number, because the mean of its divisors is an integer number (32227975).

Almost surely, 2^64455949 is an apocalyptic number.

It is an amenable number.

64455949 is a deficient number, since it is larger than the sum of its proper divisors (1).

64455949 is an equidigital number, since it uses as much as digits as its factorization.

64455949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 46.

The square root of 64455949 is about 8028.4462382207. The cubic root of 64455949 is about 400.9476468905.

The spelling of 64455949 in words is "sixty-four million, four hundred fifty-five thousand, nine hundred forty-nine".