4945649 has 4 divisors (see below), whose sum is σ = 4967664. Its totient is φ = 4923636.

The previous prime is 4945639. The next prime is 4945651. The reversal of 4945649 is 9465494.

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 not a de Polignac number, because 4945649 - 2⁸ = 4945393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4945609) 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, 10667 + ... + 11120.

It is an arithmetic number, because the mean of its divisors is an integer number (1241916).

Almost surely, 2^4945649 is an apocalyptic number.

It is an amenable number.

4945649 is a deficient number, since it is larger than the sum of its proper divisors (22015).

4945649 is a wasteful number, since it uses less digits than its factorization.

4945649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22014.

The product of its digits is 155520, while the sum is 41.

The square root of 4945649 is about 2223.8815166281. The cubic root of 4945649 is about 170.3757432942.

The spelling of 4945649 in words is "four million, nine hundred forty-five thousand, six hundred forty-nine".