311404417 has 2 divisors, whose sum is σ = 311404418. Its totient is φ = 311404416.

The previous prime is 311404391. The next prime is 311404439. The reversal of 311404417 is 714404113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309724801 + 1679616 = 17599^2 + 1296^2 .

It is a cyclic number.

It is not a de Polignac number, because 311404417 - 2¹¹ = 311402369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311404391 and 311404400.

It is not a weakly prime, because it can be changed into another prime (311404447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155702208 + 155702209.

It is an arithmetic number, because the mean of its divisors is an integer number (155702209).

Almost surely, 2^311404417 is an apocalyptic number.

It is an amenable number.

311404417 is a deficient number, since it is larger than the sum of its proper divisors (1).

311404417 is an equidigital number, since it uses as much as digits as its factorization.

311404417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 311404417 is about 17646.6545554674. The cubic root of 311404417 is about 677.8104436395.

The spelling of 311404417 in words is "three hundred eleven million, four hundred four thousand, four hundred seventeen".