1491654523 has 2 divisors, whose sum is σ = 1491654524. Its totient is φ = 1491654522.

The previous prime is 1491654509. The next prime is 1491654539. The reversal of 1491654523 is 3254561941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1491654523 - 2⁹ = 1491654011 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491654323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745827261 + 745827262.

It is an arithmetic number, because the mean of its divisors is an integer number (745827262).

Almost surely, 2^1491654523 is an apocalyptic number.

1491654523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491654523 is an equidigital number, since it uses as much as digits as its factorization.

1491654523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 1491654523 is about 38621.9435424993. The cubic root of 1491654523 is about 1142.5873629502.

The spelling of 1491654523 in words is "one billion, four hundred ninety-one million, six hundred fifty-four thousand, five hundred twenty-three".