1213577870 has 8 divisors (see below), whose sum is σ = 2184440184. Its totient is φ = 485431144.

The previous prime is 1213577839. The next prime is 1213577881. The reversal of 1213577870 is 787753121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60678884 + ... + 60678903.

It is an arithmetic number, because the mean of its divisors is an integer number (273055023).

Almost surely, 2^1213577870 is an apocalyptic number.

1213577870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213577870 is a deficient number, since it is larger than the sum of its proper divisors (970862314).

1213577870 is a wasteful number, since it uses less digits than its factorization.

1213577870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121357794.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 1213577870 is about 34836.4445660001. Note that the first 3 decimals coincide. The cubic root of 1213577870 is about 1066.6515024971.

The spelling of 1213577870 in words is "one billion, two hundred thirteen million, five hundred seventy-seven thousand, eight hundred seventy".