1213475747 has 4 divisors (see below), whose sum is σ = 1323791736. Its totient is φ = 1103159760.

The previous prime is 1213475743. The next prime is 1213475801. The reversal of 1213475747 is 7475743121.

It is a happy number.

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 1213475747 - 2² = 1213475743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213475741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55157978 + ... + 55157999.

It is an arithmetic number, because the mean of its divisors is an integer number (330947934).

Almost surely, 2^1213475747 is an apocalyptic number.

1213475747 is a deficient number, since it is larger than the sum of its proper divisors (110315989).

1213475747 is a wasteful number, since it uses less digits than its factorization.

1213475747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110315988.

The product of its digits is 164640, while the sum is 41.

The square root of 1213475747 is about 34834.9787856976. The cubic root of 1213475747 is about 1066.6215819595.

The spelling of 1213475747 in words is "one billion, two hundred thirteen million, four hundred seventy-five thousand, seven hundred forty-seven".