1213337890 has 16 divisors (see below), whose sum is σ = 2208549240. Its totient is φ = 479881600.

The previous prime is 1213337869. The next prime is 1213337903. The reversal of 1213337890 is 987333121.

It is a Cunningham number, because it is equal to 34833²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 960814009 + 252523881 = 30997^2 + 15891^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680761 + ... + 682540.

Almost surely, 2^1213337890 is an apocalyptic number.

1213337890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213337890 is a deficient number, since it is larger than the sum of its proper divisors (995211350).

1213337890 is a wasteful number, since it uses less digits than its factorization.

1213337890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363397.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1213337890 is about 34833.0000143542. Note that the first 4 decimals coincide. The cubic root of 1213337890 is about 1066.5811892225.

The spelling of 1213337890 in words is "one billion, two hundred thirteen million, three hundred thirty-seven thousand, eight hundred ninety".