1243674289 has 16 divisors (see below), whose sum is σ = 1463120064. Its totient is φ = 1042200000.

The previous prime is 1243674277. The next prime is 1243674329. The reversal of 1243674289 is 9824763421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1243674289 - 2²¹ = 1241577137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243674259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104914 + ... + 116164.

It is an arithmetic number, because the mean of its divisors is an integer number (91445004).

Almost surely, 2^1243674289 is an apocalyptic number.

It is an amenable number.

1243674289 is a deficient number, since it is larger than the sum of its proper divisors (219445775).

1243674289 is a wasteful number, since it uses less digits than its factorization.

1243674289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048.

The product of its digits is 580608, while the sum is 46.

The square root of 1243674289 is about 35265.7665307306. The cubic root of 1243674289 is about 1075.3971603354.

The spelling of 1243674289 in words is "one billion, two hundred forty-three million, six hundred seventy-four thousand, two hundred eighty-nine".