1381403353 has 4 divisors (see below), whose sum is σ = 1506985488. Its totient is φ = 1255821220.

The previous prime is 1381403351. The next prime is 1381403363. The reversal of 1381403353 is 3533041831.

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 1381403353 - 2¹ = 1381403351 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381403351) 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, 62791051 + ... + 62791072.

It is an arithmetic number, because the mean of its divisors is an integer number (376746372).

Almost surely, 2^1381403353 is an apocalyptic number.

It is an amenable number.

1381403353 is a deficient number, since it is larger than the sum of its proper divisors (125582135).

1381403353 is a wasteful number, since it uses less digits than its factorization.

1381403353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125582134.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1381403353 is about 37167.2349388544. The cubic root of 1381403353 is about 1113.7135458918.

The spelling of 1381403353 in words is "one billion, three hundred eighty-one million, four hundred three thousand, three hundred fifty-three".