1377018477 has 6 divisors (see below), whose sum is σ = 1989026702. Its totient is φ = 918012312.

The previous prime is 1377018469. The next prime is 1377018551. The reversal of 1377018477 is 7748107731.

It can be written as a sum of positive squares in only one way, i.e., 1291252356 + 85766121 = 35934^2 + 9261^2 .

It is not a de Polignac number, because 1377018477 - 2³ = 1377018469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377018437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76501018 + ... + 76501035.

Almost surely, 2^1377018477 is an apocalyptic number.

It is an amenable number.

1377018477 is a deficient number, since it is larger than the sum of its proper divisors (612008225).

1377018477 is a wasteful number, since it uses less digits than its factorization.

1377018477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153002059 (or 153002056 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 45.

The square root of 1377018477 is about 37108.1995925429. The cubic root of 1377018477 is about 1112.5339068402.

The spelling of 1377018477 in words is "one billion, three hundred seventy-seven million, eighteen thousand, four hundred seventy-seven".