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311323109 is a prime number
BaseRepresentation
bin10010100011100…
…110100111100101
3210200210212000112
4102203212213211
51114144314414
650520422405
710500126356
oct2243464745
9720725015
10311323109
1114a808729
1288317a05
134c663976
142d4bdd2d
151c4e8d3e
hex128e69e5

311323109 has 2 divisors, whose sum is σ = 311323110. Its totient is φ = 311323108.

The previous prime is 311323093. The next prime is 311323141. The reversal of 311323109 is 901323113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304677025 + 6646084 = 17455^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 311323109 - 24 = 311323093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311323709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155661554 + 155661555.

It is an arithmetic number, because the mean of its divisors is an integer number (155661555).

Almost surely, 2311323109 is an apocalyptic number.

It is an amenable number.

311323109 is a deficient number, since it is larger than the sum of its proper divisors (1).

311323109 is an equidigital number, since it uses as much as digits as its factorization.

311323109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 311323109 is about 17644.3506256252. The cubic root of 311323109 is about 677.7514461796.

The spelling of 311323109 in words is "three hundred eleven million, three hundred twenty-three thousand, one hundred nine".