31404323 has 2 divisors, whose sum is σ = 31404324. Its totient is φ = 31404322.

The previous prime is 31404313. The next prime is 31404337. The reversal of 31404323 is 32340413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31404323 - 2⁶ = 31404259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31404295 and 31404304.

It is not a weakly prime, because it can be changed into another prime (31404313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15702161 + 15702162.

It is an arithmetic number, because the mean of its divisors is an integer number (15702162).

Almost surely, 2^31404323 is an apocalyptic number.

31404323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31404323 is an equidigital number, since it uses as much as digits as its factorization.

31404323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31404323 is about 5603.9560133891. The cubic root of 31404323 is about 315.4979041002.

Adding to 31404323 its reverse (32340413), we get a palindrome (63744736).

The spelling of 31404323 in words is "thirty-one million, four hundred four thousand, three hundred twenty-three".