64623013 has 12 divisors (see below), whose sum is σ = 80957100. Its totient is φ = 51129792.

The previous prime is 64622983. The next prime is 64623019. The reversal of 64623013 is 31032646.

64623013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 23059204 + 41563809 = 4802^2 + 6447^2 .

It is not a de Polignac number, because 64623013 - 2¹³ = 64614821 is a prime.

It is a super-2 number, since 2×64623013² = 8352267618396338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64623019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50088 + ... + 51361.

It is an arithmetic number, because the mean of its divisors is an integer number (6746425).

Almost surely, 2^64623013 is an apocalyptic number.

It is an amenable number.

64623013 is a deficient number, since it is larger than the sum of its proper divisors (16334087).

64623013 is a wasteful number, since it uses less digits than its factorization.

64623013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101476 (or 101469 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 64623013 is about 8038.8440089356. The cubic root of 64623013 is about 401.2937547353.

Adding to 64623013 its reverse (31032646), we get a palindrome (95655659).

The spelling of 64623013 in words is "sixty-four million, six hundred twenty-three thousand, thirteen".