64990299 has 8 divisors (see below), whose sum is σ = 94531392. Its totient is φ = 39388040.

The previous prime is 64990253. The next prime is 64990301. The reversal of 64990299 is 99209946.

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 64990299 - 2⁷ = 64990171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64990199) 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, 984669 + ... + 984734.

It is an arithmetic number, because the mean of its divisors is an integer number (11816424).

Almost surely, 2^64990299 is an apocalyptic number.

64990299 is a deficient number, since it is larger than the sum of its proper divisors (29541093).

64990299 is a wasteful number, since it uses less digits than its factorization.

64990299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969417.

The product of its (nonzero) digits is 314928, while the sum is 48.

The square root of 64990299 is about 8061.6560953690. The cubic root of 64990299 is about 402.0525722685.

The spelling of 64990299 in words is "sixty-four million, nine hundred ninety thousand, two hundred ninety-nine".