1229947137 has 12 divisors (see below), whose sum is σ = 1778829780. Its totient is φ = 818931168.

The previous prime is 1229947123. The next prime is 1229947141. The reversal of 1229947137 is 7317499221.

It can be written as a sum of positive squares in 2 ways, for example, as 974938176 + 255008961 = 31224^2 + 15969^2 .

It is not a de Polignac number, because 1229947137 - 2¹⁵ = 1229914369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1229947092 and 1229947101.

It is not an unprimeable number, because it can be changed into a prime (1229947177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78562 + ... + 92907.

It is an arithmetic number, because the mean of its divisors is an integer number (148235815).

Almost surely, 2^1229947137 is an apocalyptic number.

It is an amenable number.

1229947137 is a deficient number, since it is larger than the sum of its proper divisors (548882643).

1229947137 is a wasteful number, since it uses less digits than its factorization.

1229947137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172272 (or 172269 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1229947137 is about 35070.6021761817. The cubic root of 1229947137 is about 1071.4259199858.

The spelling of 1229947137 in words is "one billion, two hundred twenty-nine million, nine hundred forty-seven thousand, one hundred thirty-seven".