68284919 has 4 divisors (see below), whose sum is σ = 68302080. Its totient is φ = 68267760.

The previous prime is 68284901. The next prime is 68284933. The reversal of 68284919 is 91948286.

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 68284919 - 2¹⁶ = 68219383 is a prime.

It is a super-2 number, since 2×68284919² = 9325660325673122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68284949) 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, 827 + ... + 11715.

It is an arithmetic number, because the mean of its divisors is an integer number (17075520).

Almost surely, 2^68284919 is an apocalyptic number.

68284919 is a deficient number, since it is larger than the sum of its proper divisors (17161).

68284919 is a wasteful number, since it uses less digits than its factorization.

68284919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17160.

The product of its digits is 248832, while the sum is 47.

The square root of 68284919 is about 8263.4689446987. The cubic root of 68284919 is about 408.7347850079.

The spelling of 68284919 in words is "sixty-eight million, two hundred eighty-four thousand, nine hundred nineteen".