320978523 has 8 divisors (see below), whose sum is σ = 434987536. Its totient is φ = 210477600.

The previous prime is 320978521. The next prime is 320978551. The reversal of 320978523 is 325879023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320978523 - 2¹ = 320978521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320978521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 876808 + ... + 877173.

It is an arithmetic number, because the mean of its divisors is an integer number (54373442).

Almost surely, 2^320978523 is an apocalyptic number.

320978523 is a deficient number, since it is larger than the sum of its proper divisors (114009013).

320978523 is a wasteful number, since it uses less digits than its factorization.

320978523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754045.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 320978523 is about 17915.8734925205. The cubic root of 320978523 is about 684.6868570661.

The spelling of 320978523 in words is "three hundred twenty million, nine hundred seventy-eight thousand, five hundred twenty-three".