67742819 has 4 divisors (see below), whose sum is σ = 69573744. Its totient is φ = 65911896.

The previous prime is 67742813. The next prime is 67742827. The reversal of 67742819 is 91824776.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67742819 is a prime.

It is a super-2 number, since 2×67742819² = 9178179052133522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67742819.

It is not an unprimeable number, because it can be changed into a prime (67742813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 915407 + ... + 915480.

It is an arithmetic number, because the mean of its divisors is an integer number (17393436).

Almost surely, 2^67742819 is an apocalyptic number.

67742819 is a deficient number, since it is larger than the sum of its proper divisors (1830925).

67742819 is a wasteful number, since it uses less digits than its factorization.

67742819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830924.

The product of its digits is 169344, while the sum is 44.

The square root of 67742819 is about 8230.6025903332. The cubic root of 67742819 is about 407.6502894533.

The spelling of 67742819 in words is "sixty-seven million, seven hundred forty-two thousand, eight hundred nineteen".