383921428861 has 2 divisors, whose sum is σ = 383921428862. Its totient is φ = 383921428860.

The previous prime is 383921428823. The next prime is 383921428883. The reversal of 383921428861 is 168824129383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253795295961 + 130126132900 = 503781^2 + 360730^2 .

It is a cyclic number.

It is not a de Polignac number, because 383921428861 - 2³⁵ = 349561690493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (383921428061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191960714430 + 191960714431.

It is an arithmetic number, because the mean of its divisors is an integer number (191960714431).

Almost surely, 2^383921428861 is an apocalyptic number.

It is an amenable number.

383921428861 is a deficient number, since it is larger than the sum of its proper divisors (1).

383921428861 is an equidigital number, since it uses as much as digits as its factorization.

383921428861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 55.

The spelling of 383921428861 in words is "three hundred eighty-three billion, nine hundred twenty-one million, four hundred twenty-eight thousand, eight hundred sixty-one".