109977919 has 2 divisors, whose sum is σ = 109977920. Its totient is φ = 109977918.

The previous prime is 109977911. The next prime is 109977971. The reversal of 109977919 is 919779901.

It is an a-pointer prime, because the next prime (109977971) can be obtained adding 109977919 to its sum of digits (52).

It is a weak prime.

It is an emirp because it is prime and its reverse (919779901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109977919 - 2³ = 109977911 is a prime.

It is a super-2 number, since 2×109977919² = 24190285335141122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109977911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54988959 + 54988960.

It is an arithmetic number, because the mean of its divisors is an integer number (54988960).

Almost surely, 2^109977919 is an apocalyptic number.

109977919 is a deficient number, since it is larger than the sum of its proper divisors (1).

109977919 is an equidigital number, since it uses as much as digits as its factorization.

109977919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 321489, while the sum is 52.

The square root of 109977919 is about 10487.0357584973. The cubic root of 109977919 is about 479.1099231542.

The spelling of 109977919 in words is "one hundred nine million, nine hundred seventy-seven thousand, nine hundred nineteen".