6461993 has 4 divisors (see below), whose sum is σ = 6469008. Its totient is φ = 6454980.

The previous prime is 6461953. The next prime is 6461999. The reversal of 6461993 is 3991646.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6461993 - 2⁸ = 6461737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6461999) 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, 1871 + ... + 4052.

It is an arithmetic number, because the mean of its divisors is an integer number (1617252).

Almost surely, 2^6461993 is an apocalyptic number.

It is an amenable number.

6461993 is a deficient number, since it is larger than the sum of its proper divisors (7015).

6461993 is a wasteful number, since it uses less digits than its factorization.

6461993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014.

The product of its digits is 34992, while the sum is 38.

The square root of 6461993 is about 2542.0450428739. The cubic root of 6461993 is about 186.2610989887.

The spelling of 6461993 in words is "six million, four hundred sixty-one thousand, nine hundred ninety-three".