1377911957 has 8 divisors (see below), whose sum is σ = 1391669400. Its totient is φ = 1364221440.

The previous prime is 1377911929. The next prime is 1377911989. The reversal of 1377911957 is 7591197731.

It can be written as a sum of positive squares in 4 ways, for example, as 208340356 + 1169571601 = 14434^2 + 34199^2 .

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 1377911957 - 2⁸ = 1377911701 is a prime.

It is a super-2 number, since 2×1377911957² = 3797282722487139698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377911257) by changing a digit.

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, 25169 + ... + 58217.

It is an arithmetic number, because the mean of its divisors is an integer number (173958675).

Almost surely, 2^1377911957 is an apocalyptic number.

It is an amenable number.

1377911957 is a deficient number, since it is larger than the sum of its proper divisors (13757443).

1377911957 is a wasteful number, since it uses less digits than its factorization.

1377911957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33463.

The product of its digits is 416745, while the sum is 50.

The square root of 1377911957 is about 37120.2364890096. The cubic root of 1377911957 is about 1112.7744777783.

The spelling of 1377911957 in words is "one billion, three hundred seventy-seven million, nine hundred eleven thousand, nine hundred fifty-seven".