68724619 has 4 divisors (see below), whose sum is σ = 68761096. Its totient is φ = 68688144.

The previous prime is 68724563. The next prime is 68724629. The reversal of 68724619 is 91642786.

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 68724619 - 2⁹ = 68724107 is a prime.

It is a super-2 number, since 2×68724619² = 9446146513390322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68724629) 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, 15249 + ... + 19234.

It is an arithmetic number, because the mean of its divisors is an integer number (17190274).

Almost surely, 2^68724619 is an apocalyptic number.

68724619 is a deficient number, since it is larger than the sum of its proper divisors (36477).

68724619 is a wasteful number, since it uses less digits than its factorization.

68724619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36476.

The product of its digits is 145152, while the sum is 43.

The square root of 68724619 is about 8290.0313027153. The cubic root of 68724619 is about 409.6102165058.

The spelling of 68724619 in words is "sixty-eight million, seven hundred twenty-four thousand, six hundred nineteen".