120099639 has 12 divisors (see below), whose sum is σ = 176014328. Its totient is φ = 72787440.

The previous prime is 120099631. The next prime is 120099647. The reversal of 120099639 is 936990021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120099631) and next prime (120099647).

It is not a de Polignac number, because 120099639 - 2³ = 120099631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120099597 and 120099606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120099631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165064 + ... + 165789.

Almost surely, 2^120099639 is an apocalyptic number.

120099639 is a deficient number, since it is larger than the sum of its proper divisors (55914689).

120099639 is a wasteful number, since it uses less digits than its factorization.

120099639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330878 (or 330867 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 120099639 is about 10958.9980837666. The cubic root of 120099639 is about 493.3788942683.

The spelling of 120099639 in words is "one hundred twenty million, ninety-nine thousand, six hundred thirty-nine".