68377999 has 4 divisors (see below), whose sum is σ = 68755960. Its totient is φ = 68000040.

The previous prime is 68377993. The next prime is 68378021. The reversal of 68377999 is 99977386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99977386 = 2 ⋅49988693.

It is a cyclic number.

It is not a de Polignac number, because 68377999 - 2⁷ = 68377871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68377993) 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, 188709 + ... + 189070.

It is an arithmetic number, because the mean of its divisors is an integer number (17188990).

Almost surely, 2^68377999 is an apocalyptic number.

68377999 is a deficient number, since it is larger than the sum of its proper divisors (377961).

68377999 is a wasteful number, since it uses less digits than its factorization.

68377999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377960.

The product of its digits is 5143824, while the sum is 58.

The square root of 68377999 is about 8269.0990440313. The cubic root of 68377999 is about 408.9204177990.

The spelling of 68377999 in words is "sixty-eight million, three hundred seventy-seven thousand, nine hundred ninety-nine".