1974666747 has 4 divisors (see below), whose sum is σ = 2632889000. Its totient is φ = 1316444496.

The previous prime is 1974666731. The next prime is 1974666767. The reversal of 1974666747 is 7476664791.

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

It is not a de Polignac number, because 1974666747 - 2⁴ = 1974666731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1974666767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329111122 + ... + 329111127.

It is an arithmetic number, because the mean of its divisors is an integer number (658222250).

Almost surely, 2^1974666747 is an apocalyptic number.

1974666747 is a deficient number, since it is larger than the sum of its proper divisors (658222253).

1974666747 is an equidigital number, since it uses as much as digits as its factorization.

1974666747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658222252.

The product of its digits is 10668672, while the sum is 57.

The square root of 1974666747 is about 44437.2225392182. Note that the first 3 decimals coincide. The cubic root of 1974666747 is about 1254.5787800331.

The spelling of 1974666747 in words is "one billion, nine hundred seventy-four million, six hundred sixty-six thousand, seven hundred forty-seven".