1491558659 has 2 divisors, whose sum is σ = 1491558660. Its totient is φ = 1491558658.

The previous prime is 1491558617. The next prime is 1491558697. The reversal of 1491558659 is 9568551941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1491558659 - 2¹² = 1491554563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1491558659.

It is not a weakly prime, because it can be changed into another prime (1491558559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745779329 + 745779330.

It is an arithmetic number, because the mean of its divisors is an integer number (745779330).

Almost surely, 2^1491558659 is an apocalyptic number.

1491558659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491558659 is an equidigital number, since it uses as much as digits as its factorization.

1491558659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 53.

The square root of 1491558659 is about 38620.7024664234. The cubic root of 1491558659 is about 1142.5628855796.

The spelling of 1491558659 in words is "one billion, four hundred ninety-one million, five hundred fifty-eight thousand, six hundred fifty-nine".