1213823701 has 4 divisors (see below), whose sum is σ = 1218659904. Its totient is φ = 1208987500.

The previous prime is 1213823641. The next prime is 1213823719. The reversal of 1213823701 is 1073283121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213823701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213823701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213823761) 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, 2417725 + ... + 2418226.

It is an arithmetic number, because the mean of its divisors is an integer number (304664976).

Almost surely, 2^1213823701 is an apocalyptic number.

It is an amenable number.

1213823701 is a deficient number, since it is larger than the sum of its proper divisors (4836203).

1213823701 is an equidigital number, since it uses as much as digits as its factorization.

1213823701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836202.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1213823701 is about 34839.9727468321. The cubic root of 1213823701 is about 1066.7235204831.

The spelling of 1213823701 in words is "one billion, two hundred thirteen million, eight hundred twenty-three thousand, seven hundred one".