320940437 has 4 divisors (see below), whose sum is σ = 323390496. Its totient is φ = 318490380.

The previous prime is 320940421. The next prime is 320940469. The reversal of 320940437 is 734049023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320940437 - 2⁴ = 320940421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320940407) 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, 1224833 + ... + 1225094.

It is an arithmetic number, because the mean of its divisors is an integer number (80847624).

Almost surely, 2^320940437 is an apocalyptic number.

It is an amenable number.

320940437 is a deficient number, since it is larger than the sum of its proper divisors (2450059).

320940437 is a wasteful number, since it uses less digits than its factorization.

320940437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450058.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 320940437 is about 17914.8105488169. The cubic root of 320940437 is about 684.6597752800.

The spelling of 320940437 in words is "three hundred twenty million, nine hundred forty thousand, four hundred thirty-seven".