68390019 has 12 divisors (see below), whose sum is σ = 98881536. Its totient is φ = 45549072.

The previous prime is 68390011. The next prime is 68390041. The reversal of 68390019 is 91009386.

It is not a de Polignac number, because 68390019 - 2³ = 68390011 is a prime.

It is a super-2 number, since 2×68390019² = 9354389397640722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68390011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8062 + ... + 14204.

It is an arithmetic number, because the mean of its divisors is an integer number (8240128).

Almost surely, 2^68390019 is an apocalyptic number.

68390019 is a deficient number, since it is larger than the sum of its proper divisors (30491517).

68390019 is a wasteful number, since it uses less digits than its factorization.

68390019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386 (or 7383 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 68390019 is about 8269.8258143688. The cubic root of 68390019 is about 408.9443774328.

The spelling of 68390019 in words is "sixty-eight million, three hundred ninety thousand, nineteen".