1213074923 has 4 divisors (see below), whose sum is σ = 1213147848. Its totient is φ = 1213002000.

The previous prime is 1213074881. The next prime is 1213074937. The reversal of 1213074923 is 3294703121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3294703121 = 1129 ⋅2918249.

It is a cyclic number.

It is not a de Polignac number, because 1213074923 - 2¹⁶ = 1213009387 is a prime.

It is a super-2 number, since 2×1213074923² = 2943101537622911858, which contains 22 as substring.

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 1213074923.

It is not an unprimeable number, because it can be changed into a prime (1213074983) 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, 2048 + ... + 49298.

It is an arithmetic number, because the mean of its divisors is an integer number (303286962).

Almost surely, 2^1213074923 is an apocalyptic number.

1213074923 is a deficient number, since it is larger than the sum of its proper divisors (72925).

1213074923 is an equidigital number, since it uses as much as digits as its factorization.

1213074923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72924.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1213074923 is about 34829.2251277573. The cubic root of 1213074923 is about 1066.5041301931.

The spelling of 1213074923 in words is "one billion, two hundred thirteen million, seventy-four thousand, nine hundred twenty-three".