1377534985 has 8 divisors (see below), whose sum is σ = 1688213376. Its totient is φ = 1078580400.

The previous prime is 1377534967. The next prime is 1377534997. The reversal of 1377534985 is 5894357731.

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

It is not a de Polignac number, because 1377534985 - 2⁷ = 1377534857 is a prime.

It is a super-3 number, since 3×1377534985³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2930691 + ... + 2931160.

It is an arithmetic number, because the mean of its divisors is an integer number (211026672).

Almost surely, 2^1377534985 is an apocalyptic number.

It is an amenable number.

1377534985 is a deficient number, since it is larger than the sum of its proper divisors (310678391).

1377534985 is an equidigital number, since it uses as much as digits as its factorization.

1377534985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5861903.

The product of its digits is 3175200, while the sum is 52.

The square root of 1377534985 is about 37115.1584261741. The cubic root of 1377534985 is about 1112.6729901425.

The spelling of 1377534985 in words is "one billion, three hundred seventy-seven million, five hundred thirty-four thousand, nine hundred eighty-five".