1649317427 has 4 divisors (see below), whose sum is σ = 1661183160. Its totient is φ = 1637451696.

The previous prime is 1649317421. The next prime is 1649317469. The reversal of 1649317427 is 7247139461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7247139461 = 43 ⋅168538127.

It is a cyclic number.

It is not a de Polignac number, because 1649317427 - 2⁸ = 1649317171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649317421) 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, 5932658 + ... + 5932935.

It is an arithmetic number, because the mean of its divisors is an integer number (415295790).

Almost surely, 2^1649317427 is an apocalyptic number.

1649317427 is a deficient number, since it is larger than the sum of its proper divisors (11865733).

1649317427 is a wasteful number, since it uses less digits than its factorization.

1649317427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11865732.

The product of its digits is 254016, while the sum is 44.

The square root of 1649317427 is about 40611.7892612478. The cubic root of 1649317427 is about 1181.5027839255.

The spelling of 1649317427 in words is "one billion, six hundred forty-nine million, three hundred seventeen thousand, four hundred twenty-seven".