1381176493 has 4 divisors (see below), whose sum is σ = 1396695420. Its totient is φ = 1365657568.

The previous prime is 1381176463. The next prime is 1381176497. The reversal of 1381176493 is 3946711831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3946711831 = 53267 ⋅74093.

It can be written as a sum of positive squares in 2 ways, for example, as 900120004 + 481056489 = 30002^2 + 21933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381176493 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 (1381176497) 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, 7759330 + ... + 7759507.

It is an arithmetic number, because the mean of its divisors is an integer number (349173855).

Almost surely, 2^1381176493 is an apocalyptic number.

It is an amenable number.

1381176493 is a deficient number, since it is larger than the sum of its proper divisors (15518927).

1381176493 is an equidigital number, since it uses as much as digits as its factorization.

1381176493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15518926.

The product of its digits is 108864, while the sum is 43.

The square root of 1381176493 is about 37164.1829319575. The cubic root of 1381176493 is about 1113.6525762779.

The spelling of 1381176493 in words is "one billion, three hundred eighty-one million, one hundred seventy-six thousand, four hundred ninety-three".