1213910079 has 4 divisors (see below), whose sum is σ = 1618546776. Its totient is φ = 809273384.

The previous prime is 1213910029. The next prime is 1213910099. The reversal of 1213910079 is 9700193121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1213910079 - 2¹⁵ = 1213877311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213910029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202318344 + ... + 202318349.

It is an arithmetic number, because the mean of its divisors is an integer number (404636694).

Almost surely, 2^1213910079 is an apocalyptic number.

1213910079 is a deficient number, since it is larger than the sum of its proper divisors (404636697).

1213910079 is an equidigital number, since it uses as much as digits as its factorization.

1213910079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404636696.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 1213910079 is about 34841.2123640955. The cubic root of 1213910079 is about 1066.7488232401.

The spelling of 1213910079 in words is "one billion, two hundred thirteen million, nine hundred ten thousand, seventy-nine".