1212680723 has 4 divisors (see below), whose sum is σ = 1251799488. Its totient is φ = 1173561960.

The previous prime is 1212680629. The next prime is 1212680743. The reversal of 1212680723 is 3270862121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3270862121 = 29 ⋅112788349.

It is a cyclic number.

It is not a de Polignac number, because 1212680723 - 2¹² = 1212676627 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 1212680723.

It is not an unprimeable number, because it can be changed into a prime (1212680743) 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, 19559336 + ... + 19559397.

It is an arithmetic number, because the mean of its divisors is an integer number (312949872).

Almost surely, 2^1212680723 is an apocalyptic number.

1212680723 is a deficient number, since it is larger than the sum of its proper divisors (39118765).

1212680723 is an equidigital number, since it uses as much as digits as its factorization.

1212680723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39118764.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1212680723 is about 34823.5656273162. The cubic root of 1212680723 is about 1066.3885941923.

The spelling of 1212680723 in words is "one billion, two hundred twelve million, six hundred eighty thousand, seven hundred twenty-three".