1928913769 has 2 divisors, whose sum is σ = 1928913770. Its totient is φ = 1928913768.

The previous prime is 1928913751. The next prime is 1928913781. The reversal of 1928913769 is 9673198291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1259398144 + 669515625 = 35488^2 + 25875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928913769 - 2⁹ = 1928913257 is a prime.

It is a super-2 number, since 2×1928913769² = 7441416656475570722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1928913739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964456884 + 964456885.

It is an arithmetic number, because the mean of its divisors is an integer number (964456885).

Almost surely, 2^1928913769 is an apocalyptic number.

It is an amenable number.

1928913769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928913769 is an equidigital number, since it uses as much as digits as its factorization.

1928913769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 55.

The square root of 1928913769 is about 43919.4008269694. The cubic root of 1928913769 is about 1244.8134468844.

The spelling of 1928913769 in words is "one billion, nine hundred twenty-eight million, nine hundred thirteen thousand, seven hundred sixty-nine".