109869451 has 2 divisors, whose sum is σ = 109869452. Its totient is φ = 109869450.

The previous prime is 109869449. The next prime is 109869469. The reversal of 109869451 is 154968901.

It is a weak prime.

It is an emirp because it is prime and its reverse (154968901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109869451 - 2¹ = 109869449 is a prime.

Together with 109869449, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 109869398 and 109869407.

It is not a weakly prime, because it can be changed into another prime (109869401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54934725 + 54934726.

It is an arithmetic number, because the mean of its divisors is an integer number (54934726).

Almost surely, 2^109869451 is an apocalyptic number.

109869451 is a deficient number, since it is larger than the sum of its proper divisors (1).

109869451 is an equidigital number, since it uses as much as digits as its factorization.

109869451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 109869451 is about 10481.8629546469. The cubic root of 109869451 is about 478.9523606487.

The spelling of 109869451 in words is "one hundred nine million, eight hundred sixty-nine thousand, four hundred fifty-one".