1377090985 has 8 divisors (see below), whose sum is σ = 1692814536. Its totient is φ = 1074802560.

The previous prime is 1377090977. The next prime is 1377090989. The reversal of 1377090985 is 5890907731.

It can be written as a sum of positive squares in 4 ways, for example, as 151880976 + 1225210009 = 12324^2 + 35003^2 .

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

It is not a de Polignac number, because 1377090985 - 2³ = 1377090977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377090989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3358554 + ... + 3358963.

It is an arithmetic number, because the mean of its divisors is an integer number (211601817).

Almost surely, 2^1377090985 is an apocalyptic number.

It is an amenable number.

1377090985 is a deficient number, since it is larger than the sum of its proper divisors (315723551).

1377090985 is an equidigital number, since it uses as much as digits as its factorization.

1377090985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717563.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 1377090985 is about 37109.1765605221. The cubic root of 1377090985 is about 1112.5534336158.

The spelling of 1377090985 in words is "one billion, three hundred seventy-seven million, ninety thousand, nine hundred eighty-five".