1213643695 has 16 divisors (see below), whose sum is σ = 1612487808. Its totient is φ = 869473440.

The previous prime is 1213643663. The next prime is 1213643713. The reversal of 1213643695 is 5963463121.

It is not a de Polignac number, because 1213643695 - 2⁵ = 1213643663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160989 + ... + 168358.

It is an arithmetic number, because the mean of its divisors is an integer number (100780488).

Almost surely, 2^1213643695 is an apocalyptic number.

1213643695 is a deficient number, since it is larger than the sum of its proper divisors (398844113).

1213643695 is a wasteful number, since it uses less digits than its factorization.

1213643695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329430.

The product of its digits is 116640, while the sum is 40.

The square root of 1213643695 is about 34837.3893252637. The cubic root of 1213643695 is about 1066.6707873647.

The spelling of 1213643695 in words is "one billion, two hundred thirteen million, six hundred forty-three thousand, six hundred ninety-five".