100561619 has 2 divisors, whose sum is σ = 100561620. Its totient is φ = 100561618.

The previous prime is 100561607. The next prime is 100561639. The reversal of 100561619 is 916165001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100561619 is a prime.

It is a super-2 number, since 2×100561619² = 20225278431802322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 100561591 and 100561600.

It is not a weakly prime, because it can be changed into another prime (100561639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280809 + 50280810.

It is an arithmetic number, because the mean of its divisors is an integer number (50280810).

Almost surely, 2^100561619 is an apocalyptic number.

100561619 is a deficient number, since it is larger than the sum of its proper divisors (1).

100561619 is an equidigital number, since it uses as much as digits as its factorization.

100561619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 100561619 is about 10028.0416333400. The cubic root of 100561619 is about 465.0261965432.

The spelling of 100561619 in words is "one hundred million, five hundred sixty-one thousand, six hundred nineteen".