64434637 has 8 divisors (see below), whose sum is σ = 66038336. Its totient is φ = 62849952.

The previous prime is 64434619. The next prime is 64434659. The reversal of 64434637 is 73643446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64434637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64434596 and 64434605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64434677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2233 + ... + 11569.

It is an arithmetic number, because the mean of its divisors is an integer number (8254792).

Almost surely, 2^64434637 is an apocalyptic number.

64434637 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

64434637 is a deficient number, since it is larger than the sum of its proper divisors (1603699).

64434637 is a wasteful number, since it uses less digits than its factorization.

64434637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507.

The product of its digits is 145152, while the sum is 37.

The square root of 64434637 is about 8027.1188480052. The cubic root of 64434637 is about 400.9034516515.

The spelling of 64434637 in words is "sixty-four million, four hundred thirty-four thousand, six hundred thirty-seven".