397837087 has 2 divisors, whose sum is σ = 397837088. Its totient is φ = 397837086.

The previous prime is 397837073. The next prime is 397837091. The reversal of 397837087 is 780738793.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397837087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397837057) 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, 198918543 + 198918544.

It is an arithmetic number, because the mean of its divisors is an integer number (198918544).

Almost surely, 2^397837087 is an apocalyptic number.

397837087 is a deficient number, since it is larger than the sum of its proper divisors (1).

397837087 is an equidigital number, since it uses as much as digits as its factorization.

397837087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The square root of 397837087 is about 19945.8538799421. The cubic root of 397837087 is about 735.4758588788.

The spelling of 397837087 in words is "three hundred ninety-seven million, eight hundred thirty-seven thousand, eighty-seven".