64494949 has 4 divisors (see below), whose sum is σ = 67889440. Its totient is φ = 61100460.

The previous prime is 64494943. The next prime is 64494961. The reversal of 64494949 is 94949446.

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-64494949 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 (64494943) 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, 1697217 + ... + 1697254.

It is an arithmetic number, because the mean of its divisors is an integer number (16972360).

Almost surely, 2^64494949 is an apocalyptic number.

It is an amenable number.

64494949 is a deficient number, since it is larger than the sum of its proper divisors (3394491).

64494949 is a wasteful number, since it uses less digits than its factorization.

64494949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394490.

The product of its digits is 1119744, while the sum is 49.

The square root of 64494949 is about 8030.8747344234. The cubic root of 64494949 is about 401.0284969684.

The spelling of 64494949 in words is "sixty-four million, four hundred ninety-four thousand, nine hundred forty-nine".