6420099 has 8 divisors (see below), whose sum is σ = 9783040. Its totient is φ = 3668616.

The previous prime is 6420079. The next prime is 6420103. The reversal of 6420099 is 9900246.

6420099 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6420099 - 2⁷ = 6419971 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152839 + ... + 152880.

It is an arithmetic number, because the mean of its divisors is an integer number (1222880).

Almost surely, 2^6420099 is an apocalyptic number.

6420099 is a deficient number, since it is larger than the sum of its proper divisors (3362941).

6420099 is a wasteful number, since it uses less digits than its factorization.

6420099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305729.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 6420099 is about 2533.7914278804. The cubic root of 6420099 is about 185.8577071040.

The spelling of 6420099 in words is "six million, four hundred twenty thousand, ninety-nine".