64990607 has 4 divisors (see below), whose sum is σ = 70898856. Its totient is φ = 59082360.

The previous prime is 64990591. The next prime is 64990657. The reversal of 64990607 is 70609946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64990607 - 2⁴ = 64990591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64990657) 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 3 ways as a sum of consecutive naturals, for example, 2954108 + ... + 2954129.

It is an arithmetic number, because the mean of its divisors is an integer number (17724714).

Almost surely, 2^64990607 is an apocalyptic number.

64990607 is a deficient number, since it is larger than the sum of its proper divisors (5908249).

64990607 is a wasteful number, since it uses less digits than its factorization.

64990607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908248.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 64990607 is about 8061.6751981210. The cubic root of 64990607 is about 402.0532073992.

The spelling of 64990607 in words is "sixty-four million, nine hundred ninety thousand, six hundred seven".