1213665364 has 12 divisors (see below), whose sum is σ = 2124691744. Its totient is φ = 606610584.

The previous prime is 1213665361. The next prime is 1213665367. The reversal of 1213665364 is 4635663121.

It is an interprime number because it is at equal distance from previous prime (1213665361) and next prime (1213665367).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213665361) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 42912 + ... + 65335.

Almost surely, 2^1213665364 is an apocalyptic number.

It is an amenable number.

1213665364 is a deficient number, since it is larger than the sum of its proper divisors (911026380).

1213665364 is a wasteful number, since it uses less digits than its factorization.

1213665364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111054 (or 111052 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1213665364 is about 34837.7003259400. The cubic root of 1213665364 is about 1066.6771356177.

The spelling of 1213665364 in words is "one billion, two hundred thirteen million, six hundred sixty-five thousand, three hundred sixty-four".