109777391 has 2 divisors, whose sum is σ = 109777392. Its totient is φ = 109777390.

The previous prime is 109777379. The next prime is 109777397. The reversal of 109777391 is 193777901.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109777391 - 2¹⁰ = 109776367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109777397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54888695 + 54888696.

It is an arithmetic number, because the mean of its divisors is an integer number (54888696).

Almost surely, 2^109777391 is an apocalyptic number.

109777391 is a deficient number, since it is larger than the sum of its proper divisors (1).

109777391 is an equidigital number, since it uses as much as digits as its factorization.

109777391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83349, while the sum is 44.

The square root of 109777391 is about 10477.4706394244. The cubic root of 109777391 is about 478.8185513120.

The spelling of 109777391 in words is "one hundred nine million, seven hundred seventy-seven thousand, three hundred ninety-one".