64206939 has 8 divisors (see below), whose sum is σ = 86367312. Its totient is φ = 42425600.

The previous prime is 64206937. The next prime is 64206959. The reversal of 64206939 is 93960246.

It is a happy number.

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 64206939 - 2¹ = 64206937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64206897 and 64206906.

It is not an unprimeable number, because it can be changed into a prime (64206937) 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, 94362 + ... + 95039.

It is an arithmetic number, because the mean of its divisors is an integer number (10795914).

Almost surely, 2^64206939 is an apocalyptic number.

64206939 is a deficient number, since it is larger than the sum of its proper divisors (22160373).

64206939 is a wasteful number, since it uses less digits than its factorization.

64206939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189517.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 64206939 is about 8012.9232493516. The cubic root of 64206939 is about 400.4306590822.

The spelling of 64206939 in words is "sixty-four million, two hundred six thousand, nine hundred thirty-nine".