320696477 has 2 divisors, whose sum is σ = 320696478. Its totient is φ = 320696476.

The previous prime is 320696461. The next prime is 320696507. The reversal of 320696477 is 774696023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259403236 + 61293241 = 16106^2 + 7829^2 .

It is an emirp because it is prime and its reverse (774696023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320696477 - 2⁴ = 320696461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320696407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160348238 + 160348239.

It is an arithmetic number, because the mean of its divisors is an integer number (160348239).

Almost surely, 2^320696477 is an apocalyptic number.

It is an amenable number.

320696477 is a deficient number, since it is larger than the sum of its proper divisors (1).

320696477 is an equidigital number, since it uses as much as digits as its factorization.

320696477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The square root of 320696477 is about 17908.0003629663. Note that the first 3 decimals coincide. The cubic root of 320696477 is about 684.4862519722.

The spelling of 320696477 in words is "three hundred twenty million, six hundred ninety-six thousand, four hundred seventy-seven".