1213347965 has 32 divisors (see below), whose sum is σ = 1547251200. Its totient is φ = 912038400.

The previous prime is 1213347913. The next prime is 1213347983. The reversal of 1213347965 is 5697433121.

It is not a de Polignac number, because 1213347965 - 2¹⁸ = 1213085821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 835490 + ... + 836940.

It is an arithmetic number, because the mean of its divisors is an integer number (48351600).

Almost surely, 2^1213347965 is an apocalyptic number.

It is an amenable number.

1213347965 is a deficient number, since it is larger than the sum of its proper divisors (333903235).

1213347965 is a wasteful number, since it uses less digits than its factorization.

1213347965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its digits is 136080, while the sum is 41.

The square root of 1213347965 is about 34833.1446326627. The cubic root of 1213347965 is about 1066.5841413476.

The spelling of 1213347965 in words is "one billion, two hundred thirteen million, three hundred forty-seven thousand, nine hundred sixty-five".