109821630439 has 4 divisors (see below), whose sum is σ = 109823396256. Its totient is φ = 109819864624.

The previous prime is 109821630437. The next prime is 109821630493. The reversal of 109821630439 is 934036128901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109821630439 - 2¹ = 109821630437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109821630437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786079 + ... + 915184.

It is an arithmetic number, because the mean of its divisors is an integer number (27455849064).

Almost surely, 2^109821630439 is an apocalyptic number.

109821630439 is a deficient number, since it is larger than the sum of its proper divisors (1765817).

109821630439 is an equidigital number, since it uses as much as digits as its factorization.

109821630439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765816.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 109821630439 in words is "one hundred nine billion, eight hundred twenty-one million, six hundred thirty thousand, four hundred thirty-nine".