1387090081 has 8 divisors (see below), whose sum is σ = 1496663784. Its totient is φ = 1277927040.

The previous prime is 1387090069. The next prime is 1387090091. The reversal of 1387090081 is 1800907831.

It can be written as a sum of positive squares in 4 ways, for example, as 15054400 + 1372035681 = 3880^2 + 37041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1387090081 - 2¹¹ = 1387088033 is a prime.

It is a super-2 number, since 2×1387090081² = 3848037785617173122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387090081.

It is not an unprimeable number, because it can be changed into a prime (1387090031) 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 7 ways as a sum of consecutive naturals, for example, 95626 + ... + 109171.

It is an arithmetic number, because the mean of its divisors is an integer number (187082973).

Almost surely, 2^1387090081 is an apocalyptic number.

It is an amenable number.

1387090081 is a deficient number, since it is larger than the sum of its proper divisors (109573703).

1387090081 is a wasteful number, since it uses less digits than its factorization.

1387090081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205331.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1387090081 is about 37243.6582655356. The cubic root of 1387090081 is about 1115.2397028671.

The spelling of 1387090081 in words is "one billion, three hundred eighty-seven million, ninety thousand, eighty-one".