1382965921 has 2 divisors, whose sum is σ = 1382965922. Its totient is φ = 1382965920.

The previous prime is 1382965889. The next prime is 1382965937. The reversal of 1382965921 is 1295692831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1138387600 + 244578321 = 33740^2 + 15639^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382965921 - 2⁵ = 1382965889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1382965621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691482960 + 691482961.

It is an arithmetic number, because the mean of its divisors is an integer number (691482961).

Almost surely, 2^1382965921 is an apocalyptic number.

It is an amenable number.

1382965921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382965921 is an equidigital number, since it uses as much as digits as its factorization.

1382965921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 1382965921 is about 37188.2497705929. The cubic root of 1382965921 is about 1114.1333116313.

The spelling of 1382965921 in words is "one billion, three hundred eighty-two million, nine hundred sixty-five thousand, nine hundred twenty-one".