1378941533 has 4 divisors (see below), whose sum is σ = 1380547680. Its totient is φ = 1377335388.

The previous prime is 1378941469. The next prime is 1378941547. The reversal of 1378941533 is 3351498731.

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 1378941533 - 2⁶ = 1378941469 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 (1378946533) 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, 801785 + ... + 803502.

It is an arithmetic number, because the mean of its divisors is an integer number (345136920).

Almost surely, 2^1378941533 is an apocalyptic number.

It is an amenable number.

1378941533 is a deficient number, since it is larger than the sum of its proper divisors (1606147).

1378941533 is an equidigital number, since it uses as much as digits as its factorization.

1378941533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606146.

The product of its digits is 272160, while the sum is 44.

The square root of 1378941533 is about 37134.1020222652. The cubic root of 1378941533 is about 1113.0515638568.

The spelling of 1378941533 in words is "one billion, three hundred seventy-eight million, nine hundred forty-one thousand, five hundred thirty-three".