100768391 has 4 divisors (see below), whose sum is σ = 101982552. Its totient is φ = 99554232.

The previous prime is 100768379. The next prime is 100768433. The reversal of 100768391 is 193867001.

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-100768391 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 (100768331) 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, 606956 + ... + 607121.

It is an arithmetic number, because the mean of its divisors is an integer number (25495638).

Almost surely, 2^100768391 is an apocalyptic number.

100768391 is a deficient number, since it is larger than the sum of its proper divisors (1214161).

100768391 is an equidigital number, since it uses as much as digits as its factorization.

100768391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214160.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 100768391 is about 10038.3460291026. The cubic root of 100768391 is about 465.3447029791.

The spelling of 100768391 in words is "one hundred million, seven hundred sixty-eight thousand, three hundred ninety-one".