79137649 has 2 divisors, whose sum is σ = 79137650. Its totient is φ = 79137648.

The previous prime is 79137647. The next prime is 79137661. The reversal of 79137649 is 94673197.

79137649 = T₇₂₆₂ + T₇₂₆₃ + T₇₂₆₄.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54287424 + 24850225 = 7368^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 79137649 - 2¹ = 79137647 is a prime.

Together with 79137647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 79137599 and 79137608.

It is not a weakly prime, because it can be changed into another prime (79137647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39568824 + 39568825.

It is an arithmetic number, because the mean of its divisors is an integer number (39568825).

Almost surely, 2^79137649 is an apocalyptic number.

79137649 is the 7264-th centered triangular number.

It is an amenable number.

79137649 is a deficient number, since it is larger than the sum of its proper divisors (1).

79137649 is an equidigital number, since it uses as much as digits as its factorization.

79137649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 46.

The square root of 79137649 is about 8895.9344084812. The cubic root of 79137649 is about 429.3331090272. Note that the first 3 decimals are identical.

The spelling of 79137649 in words is "seventy-nine million, one hundred thirty-seven thousand, six hundred forty-nine".