320426377 has 4 divisors (see below), whose sum is σ = 320512660. Its totient is φ = 320340096.

The previous prime is 320426371. The next prime is 320426389. The reversal of 320426377 is 773624023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 773624023 = 71 ⋅10896113.

It can be written as a sum of positive squares in 2 ways, for example, as 261274896 + 59151481 = 16164^2 + 7691^2 .

It is a cyclic number.

It is not a de Polignac number, because 320426377 - 2³ = 320426369 is a prime.

It is a super-3 number, since 3×320426377³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320426371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37308 + ... + 45085.

It is an arithmetic number, because the mean of its divisors is an integer number (80128165).

Almost surely, 2^320426377 is an apocalyptic number.

It is an amenable number.

320426377 is a deficient number, since it is larger than the sum of its proper divisors (86283).

320426377 is an equidigital number, since it uses as much as digits as its factorization.

320426377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86282.

The product of its (nonzero) digits is 42336, while the sum is 34.

The square root of 320426377 is about 17900.4574522552. The cubic root of 320426377 is about 684.2940331839.

The spelling of 320426377 in words is "three hundred twenty million, four hundred twenty-six thousand, three hundred seventy-seven".