396129551 has 2 divisors, whose sum is σ = 396129552. Its totient is φ = 396129550.

The previous prime is 396129497. The next prime is 396129557. The reversal of 396129551 is 155921693.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396129551 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 396129499 and 396129508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396129557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198064775 + 198064776.

It is an arithmetic number, because the mean of its divisors is an integer number (198064776).

Almost surely, 2^396129551 is an apocalyptic number.

396129551 is a deficient number, since it is larger than the sum of its proper divisors (1).

396129551 is an equidigital number, since it uses as much as digits as its factorization.

396129551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72900, while the sum is 41.

The square root of 396129551 is about 19903.0035673011. The cubic root of 396129551 is about 734.4221172268.

The spelling of 396129551 in words is "three hundred ninety-six million, one hundred twenty-nine thousand, five hundred fifty-one".