396621503 has 2 divisors, whose sum is σ = 396621504. Its totient is φ = 396621502.

The previous prime is 396621443. The next prime is 396621521. The reversal of 396621503 is 305126693.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 396621503 - 2²² = 392427199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396621403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198310751 + 198310752.

It is an arithmetic number, because the mean of its divisors is an integer number (198310752).

Almost surely, 2^396621503 is an apocalyptic number.

396621503 is a deficient number, since it is larger than the sum of its proper divisors (1).

396621503 is an equidigital number, since it uses as much as digits as its factorization.

396621503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 396621503 is about 19915.3584702862. The cubic root of 396621503 is about 734.7260169364.

The spelling of 396621503 in words is "three hundred ninety-six million, six hundred twenty-one thousand, five hundred three".