321090023 has 2 divisors, whose sum is σ = 321090024. Its totient is φ = 321090022.

The previous prime is 321090019. The next prime is 321090043. The reversal of 321090023 is 320090123.

It is an a-pointer prime, because the next prime (321090043) can be obtained adding 321090023 to its sum of digits (20).

It is a weak prime.

It is an emirp because it is prime and its reverse (320090123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321090023 - 2² = 321090019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321089977 and 321090004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321090043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160545011 + 160545012.

It is an arithmetic number, because the mean of its divisors is an integer number (160545012).

Almost surely, 2^321090023 is an apocalyptic number.

321090023 is a deficient number, since it is larger than the sum of its proper divisors (1).

321090023 is an equidigital number, since it uses as much as digits as its factorization.

321090023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 321090023 is about 17918.9849879953. The cubic root of 321090023 is about 684.7661289809.

The spelling of 321090023 in words is "three hundred twenty-one million, ninety thousand, twenty-three".