400680323 has 2 divisors, whose sum is σ = 400680324. Its totient is φ = 400680322.

The previous prime is 400680317. The next prime is 400680383. The reversal of 400680323 is 323086004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400680323 - 2⁴ = 400680307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400680292 and 400680301.

It is not a weakly prime, because it can be changed into another prime (400680383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200340161 + 200340162.

It is an arithmetic number, because the mean of its divisors is an integer number (200340162).

Almost surely, 2^400680323 is an apocalyptic number.

400680323 is a deficient number, since it is larger than the sum of its proper divisors (1).

400680323 is an equidigital number, since it uses as much as digits as its factorization.

400680323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 400680323 is about 20017.0008492781. Note that the first 3 decimals coincide. The cubic root of 400680323 is about 737.2237850236.

The spelling of 400680323 in words is "four hundred million, six hundred eighty thousand, three hundred twenty-three".