64401373 has 8 divisors (see below), whose sum is σ = 66889080. Its totient is φ = 61931520.

The previous prime is 64401361. The next prime is 64401383. The reversal of 64401373 is 37310446.

It can be written as a sum of positive squares in 4 ways, for example, as 11009124 + 53392249 = 3318^2 + 7307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64401373 - 2²⁵ = 30846941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3133 + ... + 11773.

It is an arithmetic number, because the mean of its divisors is an integer number (8361135).

Almost surely, 2^64401373 is an apocalyptic number.

It is an amenable number.

64401373 is a deficient number, since it is larger than the sum of its proper divisors (2487707).

64401373 is a wasteful number, since it uses less digits than its factorization.

64401373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 64401373 is about 8025.0466042260. The cubic root of 64401373 is about 400.8344517651.

The spelling of 64401373 in words is "sixty-four million, four hundred one thousand, three hundred seventy-three".