928918381 has 2 divisors, whose sum is σ = 928918382. Its totient is φ = 928918380.

The previous prime is 928918373. The next prime is 928918399. The reversal of 928918381 is 183819829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679436356 + 249482025 = 26066^2 + 15795^2 .

It is an emirp because it is prime and its reverse (183819829) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 928918381 - 2³ = 928918373 is a prime.

It is a super-2 number, since 2×928918381² = 1725778717119322322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928912381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464459190 + 464459191.

It is an arithmetic number, because the mean of its divisors is an integer number (464459191).

Almost surely, 2^928918381 is an apocalyptic number.

It is an amenable number.

928918381 is a deficient number, since it is larger than the sum of its proper divisors (1).

928918381 is an equidigital number, since it uses as much as digits as its factorization.

928918381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 49.

The square root of 928918381 is about 30478.1623625835. The cubic root of 928918381 is about 975.7214492900.

The spelling of 928918381 in words is "nine hundred twenty-eight million, nine hundred eighteen thousand, three hundred eighty-one".