1487918389 has 2 divisors, whose sum is σ = 1487918390. Its totient is φ = 1487918388.

The previous prime is 1487918381. The next prime is 1487918447. The reversal of 1487918389 is 9838197841.

It is an a-pointer prime, because the next prime (1487918447) can be obtained adding 1487918389 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1486719364 + 1199025 = 38558^2 + 1095^2 .

It is an emirp because it is prime and its reverse (9838197841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1487918389 - 2³ = 1487918381 is a prime.

It is a super-2 number, since 2×1487918389² = 4427802264648710642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1487918381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743959194 + 743959195.

It is an arithmetic number, because the mean of its divisors is an integer number (743959195).

Almost surely, 2^1487918389 is an apocalyptic number.

It is an amenable number.

1487918389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487918389 is an equidigital number, since it uses as much as digits as its factorization.

1487918389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 58.

The square root of 1487918389 is about 38573.5451961574. The cubic root of 1487918389 is about 1141.6326225473.

The spelling of 1487918389 in words is "one billion, four hundred eighty-seven million, nine hundred eighteen thousand, three hundred eighty-nine".