1381332929 has 2 divisors, whose sum is σ = 1381332930. Its totient is φ = 1381332928.

The previous prime is 1381332913. The next prime is 1381332941. The reversal of 1381332929 is 9292331831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1135690000 + 245642929 = 33700^2 + 15673^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381332929 - 2⁴ = 1381332913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1381331929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690666464 + 690666465.

It is an arithmetic number, because the mean of its divisors is an integer number (690666465).

Almost surely, 2^1381332929 is an apocalyptic number.

It is an amenable number.

1381332929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381332929 is an equidigital number, since it uses as much as digits as its factorization.

1381332929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 1381332929 is about 37166.2875331933. The cubic root of 1381332929 is about 1113.6946198493.

The spelling of 1381332929 in words is "one billion, three hundred eighty-one million, three hundred thirty-two thousand, nine hundred twenty-nine".