1997706526 has 8 divisors (see below), whose sum is σ = 3093223104. Its totient is φ = 966632160.

The previous prime is 1997706521. The next prime is 1997706541. The reversal of 1997706526 is 6256077991.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997706521) 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, 16110475 + ... + 16110598.

It is an arithmetic number, because the mean of its divisors is an integer number (386652888).

Almost surely, 2^1997706526 is an apocalyptic number.

1997706526 is a deficient number, since it is larger than the sum of its proper divisors (1095516578).

1997706526 is a wasteful number, since it uses less digits than its factorization.

1997706526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32221106.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The square root of 1997706526 is about 44695.7103758291. The cubic root of 1997706526 is about 1259.4392663266.

The spelling of 1997706526 in words is "one billion, nine hundred ninety-seven million, seven hundred six thousand, five hundred twenty-six".