109079998987 has 2 divisors, whose sum is σ = 109079998988. Its totient is φ = 109079998986.

The previous prime is 109079998981. The next prime is 109079999011. The reversal of 109079998987 is 789899970901.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109079998987 - 2²³ = 109071610379 is a prime.

It is not a weakly prime, because it can be changed into another prime (109079998981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54539999493 + 54539999494.

It is an arithmetic number, because the mean of its divisors is an integer number (54539999494).

Almost surely, 2^109079998987 is an apocalyptic number.

109079998987 is a deficient number, since it is larger than the sum of its proper divisors (1).

109079998987 is an equidigital number, since it uses as much as digits as its factorization.

109079998987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 185177664, while the sum is 76.

The spelling of 109079998987 in words is "one hundred nine billion, seventy-nine million, nine hundred ninety-eight thousand, nine hundred eighty-seven".