109902439 has 2 divisors, whose sum is σ = 109902440. Its totient is φ = 109902438.

The previous prime is 109902437. The next prime is 109902461. The reversal of 109902439 is 934209901.

It is a weak prime.

It is an emirp because it is prime and its reverse (934209901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109902439 - 2¹ = 109902437 is a prime.

Together with 109902437, it forms a pair of twin primes.

109902439 is a modest number, since divided by 2439 gives 1099 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 109902398 and 109902407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109902437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54951219 + 54951220.

It is an arithmetic number, because the mean of its divisors is an integer number (54951220).

Almost surely, 2^109902439 is an apocalyptic number.

109902439 is a deficient number, since it is larger than the sum of its proper divisors (1).

109902439 is an equidigital number, since it uses as much as digits as its factorization.

109902439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 109902439 is about 10483.4364117879. The cubic root of 109902439 is about 479.0002905611. Note that the first 3 decimals are identical.

The spelling of 109902439 in words is "one hundred nine million, nine hundred two thousand, four hundred thirty-nine".