1377131473 has 4 divisors (see below), whose sum is σ = 1377356400. Its totient is φ = 1376906548.

The previous prime is 1377131447. The next prime is 1377131477. The reversal of 1377131473 is 3741317731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1377131473 - 2¹³ = 1377123281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377131477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103015 + ... + 115612.

It is an arithmetic number, because the mean of its divisors is an integer number (344339100).

Almost surely, 2^1377131473 is an apocalyptic number.

It is an amenable number.

1377131473 is a deficient number, since it is larger than the sum of its proper divisors (224927).

1377131473 is an equidigital number, since it uses as much as digits as its factorization.

1377131473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224926.

The product of its digits is 37044, while the sum is 37.

The square root of 1377131473 is about 37109.7220819558. The cubic root of 1377131473 is about 1112.5643369433.

The spelling of 1377131473 in words is "one billion, three hundred seventy-seven million, one hundred thirty-one thousand, four hundred seventy-three".