1489638715 has 4 divisors (see below), whose sum is σ = 1787566464. Its totient is φ = 1191710968.

The previous prime is 1489638713. The next prime is 1489638721. The reversal of 1489638715 is 5178369841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5178369841 = 199 ⋅26021959.

It is a cyclic number.

It is not a de Polignac number, because 1489638715 - 2¹ = 1489638713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1489638713) 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, 148963867 + ... + 148963876.

It is an arithmetic number, because the mean of its divisors is an integer number (446891616).

Almost surely, 2^1489638715 is an apocalyptic number.

1489638715 is a deficient number, since it is larger than the sum of its proper divisors (297927749).

1489638715 is an equidigital number, since it uses as much as digits as its factorization.

1489638715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297927748.

The product of its digits is 1451520, while the sum is 52.

The square root of 1489638715 is about 38595.8380528264. The cubic root of 1489638715 is about 1142.0724369591.

The spelling of 1489638715 in words is "one billion, four hundred eighty-nine million, six hundred thirty-eight thousand, seven hundred fifteen".