68894809 has 4 divisors (see below), whose sum is σ = 70360704. Its totient is φ = 67428916.

The previous prime is 68894797. The next prime is 68894843. The reversal of 68894809 is 90849886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90849886 = 2 ⋅45424943.

It is a cyclic number.

It is not a de Polignac number, because 68894809 - 2⁹ = 68894297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68894899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732877 + ... + 732970.

It is an arithmetic number, because the mean of its divisors is an integer number (17590176).

Almost surely, 2^68894809 is an apocalyptic number.

It is an amenable number.

68894809 is a deficient number, since it is larger than the sum of its proper divisors (1465895).

68894809 is a wasteful number, since it uses less digits than its factorization.

68894809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465894.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 68894809 is about 8300.2896937396. The cubic root of 68894809 is about 409.9480580639.

The spelling of 68894809 in words is "sixty-eight million, eight hundred ninety-four thousand, eight hundred nine".