64254649 has 2 divisors, whose sum is σ = 64254650. Its totient is φ = 64254648.

The previous prime is 64254647. The next prime is 64254653. The reversal of 64254649 is 94645246.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63489024 + 765625 = 7968^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 64254649 - 2¹ = 64254647 is a prime.

It is a super-2 number, since 2×64254649² = 8257319836226402, which contains 22 as substring.

Together with 64254647, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64254647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32127324 + 32127325.

It is an arithmetic number, because the mean of its divisors is an integer number (32127325).

Almost surely, 2^64254649 is an apocalyptic number.

It is an amenable number.

64254649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64254649 is an equidigital number, since it uses as much as digits as its factorization.

64254649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 40.

The square root of 64254649 is about 8015.8997623473. The cubic root of 64254649 is about 400.5298166759.

The spelling of 64254649 in words is "sixty-four million, two hundred fifty-four thousand, six hundred forty-nine".