1488487691 has 4 divisors (see below), whose sum is σ = 1489412112. Its totient is φ = 1487563272.

The previous prime is 1488487681. The next prime is 1488487703. The reversal of 1488487691 is 1967848841.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1488487691 - 2¹⁴ = 1488471307 is a prime.

It is a super-2 number, since 2×1488487691² = 4431191212517022962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1488487621) 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, 459791 + ... + 463016.

It is an arithmetic number, because the mean of its divisors is an integer number (372353028).

Almost surely, 2^1488487691 is an apocalyptic number.

1488487691 is a deficient number, since it is larger than the sum of its proper divisors (924421).

1488487691 is an equidigital number, since it uses as much as digits as its factorization.

1488487691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924420.

The product of its digits is 3096576, while the sum is 56.

The square root of 1488487691 is about 38580.9239262100. The cubic root of 1488487691 is about 1141.7782064418.

The spelling of 1488487691 in words is "one billion, four hundred eighty-eight million, four hundred eighty-seven thousand, six hundred ninety-one".