1229072918 has 4 divisors (see below), whose sum is σ = 1843609380. Its totient is φ = 614536458.

The previous prime is 1229072909. The next prime is 1229072963. The reversal of 1229072918 is 8192709221.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1229072918² = 3021240475522069448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 307268228 + ... + 307268231.

It is an arithmetic number, because the mean of its divisors is an integer number (460902345).

Almost surely, 2^1229072918 is an apocalyptic number.

1229072918 is a deficient number, since it is larger than the sum of its proper divisors (614536462).

1229072918 is an equidigital number, since it uses as much as digits as its factorization.

1229072918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614536461.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1229072918 is about 35058.1362596473. The cubic root of 1229072918 is about 1071.1720112676.

The spelling of 1229072918 in words is "one billion, two hundred twenty-nine million, seventy-two thousand, nine hundred eighteen".