1229072657 has 2 divisors, whose sum is σ = 1229072658. Its totient is φ = 1229072656.

The previous prime is 1229072651. The next prime is 1229072683. The reversal of 1229072657 is 7562709221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1103834176 + 125238481 = 33224^2 + 11191^2 .

It is an emirp because it is prime and its reverse (7562709221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1229072657 - 2⁴ = 1229072641 is a prime.

It is not a weakly prime, because it can be changed into another prime (1229072651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614536328 + 614536329.

It is an arithmetic number, because the mean of its divisors is an integer number (614536329).

Almost surely, 2^1229072657 is an apocalyptic number.

It is an amenable number.

1229072657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229072657 is an equidigital number, since it uses as much as digits as its factorization.

1229072657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 1229072657 is about 35058.1325372587. The cubic root of 1229072657 is about 1071.1719354446.

The spelling of 1229072657 in words is "one billion, two hundred twenty-nine million, seventy-two thousand, six hundred fifty-seven".