771342137 has 2 divisors, whose sum is σ = 771342138. Its totient is φ = 771342136.

The previous prime is 771342119. The next prime is 771342149. The reversal of 771342137 is 731243177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609645481 + 161696656 = 24691^2 + 12716^2 .

It is a cyclic number.

It is not a de Polignac number, because 771342137 - 2⁸ = 771341881 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 771342097 and 771342106.

It is not a weakly prime, because it can be changed into another prime (771344137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385671068 + 385671069.

It is an arithmetic number, because the mean of its divisors is an integer number (385671069).

Almost surely, 2^771342137 is an apocalyptic number.

It is an amenable number.

771342137 is a deficient number, since it is larger than the sum of its proper divisors (1).

771342137 is an equidigital number, since it uses as much as digits as its factorization.

771342137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 35.

The square root of 771342137 is about 27773.0469520361. The cubic root of 771342137 is about 917.0978716761.

The spelling of 771342137 in words is "seven hundred seventy-one million, three hundred forty-two thousand, one hundred thirty-seven".