1387457457 has 8 divisors (see below), whose sum is σ = 1852963584. Its totient is φ = 923461488.

The previous prime is 1387457447. The next prime is 1387457459. The reversal of 1387457457 is 7547547831.

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

It is not a de Polignac number, because 1387457457 - 2¹⁶ = 1387391921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1387457459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375393 + ... + 379070.

It is an arithmetic number, because the mean of its divisors is an integer number (231620448).

Almost surely, 2^1387457457 is an apocalyptic number.

It is an amenable number.

1387457457 is a deficient number, since it is larger than the sum of its proper divisors (465506127).

1387457457 is an equidigital number, since it uses as much as digits as its factorization.

1387457457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755079.

The product of its digits is 3292800, while the sum is 51.

The square root of 1387457457 is about 37248.5900001597. The cubic root of 1387457457 is about 1115.3381526460.

The spelling of 1387457457 in words is "one billion, three hundred eighty-seven million, four hundred fifty-seven thousand, four hundred fifty-seven".