396557479 has 2 divisors, whose sum is σ = 396557480. Its totient is φ = 396557478.

The previous prime is 396557477. The next prime is 396557533. The reversal of 396557479 is 974755693.

It is a weak prime.

It is an emirp because it is prime and its reverse (974755693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396557479 - 2¹ = 396557477 is a prime.

Together with 396557477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396557477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198278739 + 198278740.

It is an arithmetic number, because the mean of its divisors is an integer number (198278740).

Almost surely, 2^396557479 is an apocalyptic number.

396557479 is a deficient number, since it is larger than the sum of its proper divisors (1).

396557479 is an equidigital number, since it uses as much as digits as its factorization.

396557479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 55.

The square root of 396557479 is about 19913.7510027619. The cubic root of 396557479 is about 734.6864808132.

The spelling of 396557479 in words is "three hundred ninety-six million, five hundred fifty-seven thousand, four hundred seventy-nine".