396842903 has 2 divisors, whose sum is σ = 396842904. Its totient is φ = 396842902.

The previous prime is 396842893. The next prime is 396842947. The reversal of 396842903 is 309248693.

It is an a-pointer prime, because the next prime (396842947) can be obtained adding 396842903 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 396842903 - 2²⁶ = 329734039 is a prime.

It is a super-2 number, since 2×396842903² = 314968579322934818, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396842503) 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, 198421451 + 198421452.

It is an arithmetic number, because the mean of its divisors is an integer number (198421452).

Almost surely, 2^396842903 is an apocalyptic number.

396842903 is a deficient number, since it is larger than the sum of its proper divisors (1).

396842903 is an equidigital number, since it uses as much as digits as its factorization.

396842903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 396842903 is about 19920.9162188891. The cubic root of 396842903 is about 734.8627031560.

The spelling of 396842903 in words is "three hundred ninety-six million, eight hundred forty-two thousand, nine hundred three".