398926727 has 2 divisors, whose sum is σ = 398926728. Its totient is φ = 398926726.

The previous prime is 398926699. The next prime is 398926729. The reversal of 398926727 is 727629893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398926727 - 2⁶ = 398926663 is a prime.

Together with 398926729, 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 (398926729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199463363 + 199463364.

It is an arithmetic number, because the mean of its divisors is an integer number (199463364).

Almost surely, 2^398926727 is an apocalyptic number.

398926727 is a deficient number, since it is larger than the sum of its proper divisors (1).

398926727 is an equidigital number, since it uses as much as digits as its factorization.

398926727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 398926727 is about 19973.1501521417. The cubic root of 398926727 is about 736.1467141900.

The spelling of 398926727 in words is "three hundred ninety-eight million, nine hundred twenty-six thousand, seven hundred twenty-seven".