64403149 has 2 divisors, whose sum is σ = 64403150. Its totient is φ = 64403148.

The previous prime is 64403117. The next prime is 64403189. The reversal of 64403149 is 94130446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 243049 = 8010^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 64403149 - 2⁵ = 64403117 is a prime.

It is a super-2 number, since 2×64403149² = 8295531202232402, which contains 22 as substring.

It is equal to p_3807535 and since 64403149 and 3807535 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64403149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64403189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32201574 + 32201575.

It is an arithmetic number, because the mean of its divisors is an integer number (32201575).

Almost surely, 2^64403149 is an apocalyptic number.

It is an amenable number.

64403149 is a deficient number, since it is larger than the sum of its proper divisors (1).

64403149 is an equidigital number, since it uses as much as digits as its factorization.

64403149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 64403149 is about 8025.1572570262. The cubic root of 64403149 is about 400.8381363421.

The spelling of 64403149 in words is "sixty-four million, four hundred three thousand, one hundred forty-nine".