109549399 has 2 divisors, whose sum is σ = 109549400. Its totient is φ = 109549398.

The previous prime is 109549369. The next prime is 109549403. The reversal of 109549399 is 993945901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 109549399 - 2¹⁷ = 109418327 is a prime.

It is a super-2 number, since 2×109549399² = 24002141642522402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109549369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54774699 + 54774700.

It is an arithmetic number, because the mean of its divisors is an integer number (54774700).

Almost surely, 2^109549399 is an apocalyptic number.

109549399 is a deficient number, since it is larger than the sum of its proper divisors (1).

109549399 is an equidigital number, since it uses as much as digits as its factorization.

109549399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 109549399 is about 10466.5848775998. The cubic root of 109549399 is about 478.4868422655.

The spelling of 109549399 in words is "one hundred nine million, five hundred forty-nine thousand, three hundred ninety-nine".