6401899 has 6 divisors (see below), whose sum is σ = 7447164. Its totient is φ = 5487300.

The previous prime is 6401893. The next prime is 6401921. The reversal of 6401899 is 9981046.

It is not a de Polignac number, because 6401899 - 2³ = 6401891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6401891) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65277 + ... + 65374.

It is an arithmetic number, because the mean of its divisors is an integer number (1241194).

Almost surely, 2^6401899 is an apocalyptic number.

6401899 is a deficient number, since it is larger than the sum of its proper divisors (1045265).

6401899 is a wasteful number, since it uses less digits than its factorization.

6401899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130665 (or 130658 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 6401899 is about 2530.1974231273. The cubic root of 6401899 is about 185.6819148144.

The spelling of 6401899 in words is "six million, four hundred one thousand, eight hundred ninety-nine".