100640779 has 2 divisors, whose sum is σ = 100640780. Its totient is φ = 100640778.

The previous prime is 100640747. The next prime is 100640783. The reversal of 100640779 is 977046001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100640779 - 2⁵ = 100640747 is a prime.

It is not a weakly prime, because it can be changed into another prime (100640719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50320389 + 50320390.

It is an arithmetic number, because the mean of its divisors is an integer number (50320390).

Almost surely, 2^100640779 is an apocalyptic number.

100640779 is a deficient number, since it is larger than the sum of its proper divisors (1).

100640779 is an equidigital number, since it uses as much as digits as its factorization.

100640779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 100640779 is about 10031.9877890675. The cubic root of 100640779 is about 465.1481841671.

The spelling of 100640779 in words is "one hundred million, six hundred forty thousand, seven hundred seventy-nine".