6406949 has 4 divisors (see below), whose sum is σ = 6685536. Its totient is φ = 6128364.

The previous prime is 6406937. The next prime is 6406951. The reversal of 6406949 is 9496046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6406949 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 (6406919) 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, 139259 + ... + 139304.

It is an arithmetic number, because the mean of its divisors is an integer number (1671384).

Almost surely, 2^6406949 is an apocalyptic number.

It is an amenable number.

6406949 is a deficient number, since it is larger than the sum of its proper divisors (278587).

6406949 is a wasteful number, since it uses less digits than its factorization.

6406949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278586.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6406949 is about 2531.1951722457. The cubic root of 6406949 is about 185.7307257072.

The spelling of 6406949 in words is "six million, four hundred six thousand, nine hundred forty-nine".