1491627017 has 4 divisors (see below), whose sum is σ = 1491877140. Its totient is φ = 1491376896.

The previous prime is 1491626953. The next prime is 1491627037. The reversal of 1491627017 is 7107261941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 326019136 + 1165607881 = 18056^2 + 34141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491627017 - 2⁶ = 1491626953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491627037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115892 + ... + 128117.

It is an arithmetic number, because the mean of its divisors is an integer number (372969285).

Almost surely, 2^1491627017 is an apocalyptic number.

It is an amenable number.

1491627017 is a deficient number, since it is larger than the sum of its proper divisors (250123).

1491627017 is an equidigital number, since it uses as much as digits as its factorization.

1491627017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250122.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 1491627017 is about 38621.5874479545. The cubic root of 1491627017 is about 1142.5803398313.

Adding to 1491627017 its reverse (7107261941), we get a palindrome (8598888958).

The spelling of 1491627017 in words is "one billion, four hundred ninety-one million, six hundred twenty-seven thousand, seventeen".