1147213805 has 16 divisors (see below), whose sum is σ = 1465288704. Its totient is φ = 859249920.

The previous prime is 1147213789. The next prime is 1147213831. The reversal of 1147213805 is 5083127411.

1147213805 = T₁₁₆₀₉ + T₁₁₆₁₀ + ... + T₁₁₆₂₅.

It is not a de Polignac number, because 1147213805 - 2⁴ = 1147213789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19097 + ... + 51566.

It is an arithmetic number, because the mean of its divisors is an integer number (91580544).

Almost surely, 2^1147213805 is an apocalyptic number.

It is an amenable number.

1147213805 is a deficient number, since it is larger than the sum of its proper divisors (318074899).

1147213805 is a wasteful number, since it uses less digits than its factorization.

1147213805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70876.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1147213805 is about 33870.5447992795. The cubic root of 1147213805 is about 1046.8427624498.

The spelling of 1147213805 in words is "one billion, one hundred forty-seven million, two hundred thirteen thousand, eight hundred five".