928540397 has 2 divisors, whose sum is σ = 928540398. Its totient is φ = 928540396.

The previous prime is 928540381. The next prime is 928540399. The reversal of 928540397 is 793045829.

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., 747530281 + 181010116 = 27341^2 + 13454^2 .

It is an emirp because it is prime and its reverse (793045829) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 928540397 - 2⁴ = 928540381 is a prime.

It is a super-3 number, since 3×928540397³ (a number of 28 digits) contains 333 as substring.

Together with 928540399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928540399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464270198 + 464270199.

It is an arithmetic number, because the mean of its divisors is an integer number (464270199).

Almost surely, 2^928540397 is an apocalyptic number.

It is an amenable number.

928540397 is a deficient number, since it is larger than the sum of its proper divisors (1).

928540397 is an equidigital number, since it uses as much as digits as its factorization.

928540397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 928540397 is about 30471.9608328706. The cubic root of 928540397 is about 975.5890884933.

The spelling of 928540397 in words is "nine hundred twenty-eight million, five hundred forty thousand, three hundred ninety-seven".