1243229877 has 20 divisors (see below), whose sum is σ = 1858358656. Its totient is φ = 828289800.

The previous prime is 1243229863. The next prime is 1243229881. The reversal of 1243229877 is 7789223421.

It is not a de Polignac number, because 1243229877 - 2²⁸ = 974794421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243229807) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 154098 + ... + 161964.

Almost surely, 2^1243229877 is an apocalyptic number.

It is an amenable number.

1243229877 is a deficient number, since it is larger than the sum of its proper divisors (615128779).

1243229877 is an equidigital number, since it uses as much as digits as its factorization.

1243229877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830 (or 9821 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 1243229877 is about 35259.4650696802. The cubic root of 1243229877 is about 1075.2690516752.

The spelling of 1243229877 in words is "one billion, two hundred forty-three million, two hundred twenty-nine thousand, eight hundred seventy-seven".