1311020471 has 2 divisors, whose sum is σ = 1311020472. Its totient is φ = 1311020470.

The previous prime is 1311020407. The next prime is 1311020483. The reversal of 1311020471 is 1740201131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311020471 - 2⁶ = 1311020407 is a prime.

It is a super-3 number, since 3×1311020471³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311023471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655510235 + 655510236.

It is an arithmetic number, because the mean of its divisors is an integer number (655510236).

Almost surely, 2^1311020471 is an apocalyptic number.

1311020471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311020471 is an equidigital number, since it uses as much as digits as its factorization.

1311020471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 1311020471 is about 36208.0166675834. The cubic root of 1311020471 is about 1094.4682254900.

The spelling of 1311020471 in words is "one billion, three hundred eleven million, twenty thousand, four hundred seventy-one".