1997657474 has 8 divisors (see below), whose sum is σ = 2996685120. Its totient is φ = 998762436.

The previous prime is 1997657447. The next prime is 1997657513. The reversal of 1997657474 is 4747567991.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24707 + ... + 67865.

It is an arithmetic number, because the mean of its divisors is an integer number (374585640).

Almost surely, 2^1997657474 is an apocalyptic number.

1997657474 is a deficient number, since it is larger than the sum of its proper divisors (999027646).

1997657474 is a wasteful number, since it uses less digits than its factorization.

1997657474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66304.

The product of its digits is 13335840, while the sum is 59.

The square root of 1997657474 is about 44695.1616397122. The cubic root of 1997657474 is about 1259.4289580856.

The spelling of 1997657474 in words is "one billion, nine hundred ninety-seven million, six hundred fifty-seven thousand, four hundred seventy-four".