1377481289 has 8 divisors (see below), whose sum is σ = 1405968840. Its totient is φ = 1349086336.

The previous prime is 1377481283. The next prime is 1377481291. The reversal of 1377481289 is 9821847731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 384160000 + 993321289 = 19600^2 + 31517^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1377481289 - 2⁸ = 1377481033 is a prime.

It is a super-4 number, since 4×1377481289⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377481283) 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, 7319 + ... + 52995.

It is an arithmetic number, because the mean of its divisors is an integer number (175746105).

Almost surely, 2^1377481289 is an apocalyptic number.

It is an amenable number.

1377481289 is a deficient number, since it is larger than the sum of its proper divisors (28487551).

1377481289 is an equidigital number, since it uses as much as digits as its factorization.

1377481289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46299.

The product of its digits is 677376, while the sum is 50.

The square root of 1377481289 is about 37114.4350489132. The cubic root of 1377481289 is about 1112.6585327081.

The spelling of 1377481289 in words is "one billion, three hundred seventy-seven million, four hundred eighty-one thousand, two hundred eighty-nine".