1316678761 has 2 divisors, whose sum is σ = 1316678762. Its totient is φ = 1316678760.

The previous prime is 1316678669. The next prime is 1316678789. The reversal of 1316678761 is 1678766131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1240448400 + 76230361 = 35220^2 + 8731^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316678761 - 2²³ = 1308290153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1316648761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658339380 + 658339381.

It is an arithmetic number, because the mean of its divisors is an integer number (658339381).

Almost surely, 2^1316678761 is an apocalyptic number.

It is an amenable number.

1316678761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316678761 is an equidigital number, since it uses as much as digits as its factorization.

1316678761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 1316678761 is about 36286.0684147511. The cubic root of 1316678761 is about 1096.0405199402.

The spelling of 1316678761 in words is "one billion, three hundred sixteen million, six hundred seventy-eight thousand, seven hundred sixty-one".