64969906 has 4 divisors (see below), whose sum is σ = 97454862. Its totient is φ = 32484952.

The previous prime is 64969901. The next prime is 64969907. The reversal of 64969906 is 60996946.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60996946 = 2 ⋅30498473.

It can be written as a sum of positive squares in only one way, i.e., 63123025 + 1846881 = 7945^2 + 1359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64969906.

It is not an unprimeable number, because it can be changed into a prime (64969901) 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, 16242475 + ... + 16242478.

Almost surely, 2^64969906 is an apocalyptic number.

64969906 is a deficient number, since it is larger than the sum of its proper divisors (32484956).

64969906 is a wasteful number, since it uses less digits than its factorization.

64969906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32484955.

The product of its (nonzero) digits is 629856, while the sum is 49.

The square root of 64969906 is about 8060.3911815743. The cubic root of 64969906 is about 402.0105151412.

The spelling of 64969906 in words is "sixty-four million, nine hundred sixty-nine thousand, nine hundred six".