100720379 has 2 divisors, whose sum is σ = 100720380. Its totient is φ = 100720378.

The previous prime is 100720369. The next prime is 100720391. The reversal of 100720379 is 973027001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100720379 is a prime.

It is not a weakly prime, because it can be changed into another prime (100720369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50360189 + 50360190.

It is an arithmetic number, because the mean of its divisors is an integer number (50360190).

Almost surely, 2^100720379 is an apocalyptic number.

100720379 is a deficient number, since it is larger than the sum of its proper divisors (1).

100720379 is an equidigital number, since it uses as much as digits as its factorization.

100720379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 100720379 is about 10035.9543143639. The cubic root of 100720379 is about 465.2707853581.

The spelling of 100720379 in words is "one hundred million, seven hundred twenty thousand, three hundred seventy-nine".