1213642353 has 64 divisors (see below), whose sum is σ = 2085027840. Its totient is φ = 609638400.

The previous prime is 1213642349. The next prime is 1213642411. The reversal of 1213642353 is 3532463121.

It is not a de Polignac number, because 1213642353 - 2² = 1213642349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213642353.

It is not an unprimeable number, because it can be changed into a prime (1213646353) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1202313 + ... + 1203321.

It is an arithmetic number, because the mean of its divisors is an integer number (32578560).

Almost surely, 2^1213642353 is an apocalyptic number.

It is an amenable number.

1213642353 is a deficient number, since it is larger than the sum of its proper divisors (871385487).

1213642353 is a wasteful number, since it uses less digits than its factorization.

1213642353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its digits is 12960, while the sum is 30.

The square root of 1213642353 is about 34837.3700643433. The cubic root of 1213642353 is about 1066.6703942036.

The spelling of 1213642353 in words is "one billion, two hundred thirteen million, six hundred forty-two thousand, three hundred fifty-three".