1974731909 has 8 divisors (see below), whose sum is σ = 1985485152. Its totient is φ = 1963992240.

The previous prime is 1974731903. The next prime is 1974731977. The reversal of 1974731909 is 9091374791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1974731909 - 2¹⁶ = 1974666373 is a prime.

It is a super-2 number, since 2×1974731909² = 7799132224845568562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974731903) 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 7 ways as a sum of consecutive naturals, for example, 437267 + ... + 441759.

It is an arithmetic number, because the mean of its divisors is an integer number (248185644).

Almost surely, 2^1974731909 is an apocalyptic number.

It is an amenable number.

1974731909 is a deficient number, since it is larger than the sum of its proper divisors (10753243).

1974731909 is a wasteful number, since it uses less digits than its factorization.

1974731909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6787.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 1974731909 is about 44437.9557248080. The cubic root of 1974731909 is about 1254.5925798238.

The spelling of 1974731909 in words is "one billion, nine hundred seventy-four million, seven hundred thirty-one thousand, nine hundred nine".