1377077881 has 9 divisors (see below), whose sum is σ = 1411483269. Its totient is φ = 1343494236.

The previous prime is 1377077837. The next prime is 1377077903. The reversal of 1377077881 is 1887707731.

The square root of 1377077881 is 37109.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1377077881 - 2¹⁹ = 1376553593 is a prime.

It is a super-2 number, since 2×1377077881² = 3792686980678900322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377075881) 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 8 ways as a sum of consecutive naturals, for example, 1595256 + ... + 1596118.

Almost surely, 2^1377077881 is an apocalyptic number.

1377077881 is the 37109-th square number.

1377077881 is the 18555-th centered octagonal number.

It is an amenable number.

1377077881 is a deficient number, since it is larger than the sum of its proper divisors (34405388).

1377077881 is an frugal number, since it uses more digits than its factorization.

1377077881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 906 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 49.

The cubic root of 1377077881 is about 1112.5499046923.

Multiplying 1377077881 by its sum of digits (49), we get a square (67476816169 = 259763²).

The spelling of 1377077881 in words is "one billion, three hundred seventy-seven million, seventy-seven thousand, eight hundred eighty-one".