9897923534 has 16 divisors (see below), whose sum is σ = 15131577600. Its totient is φ = 4854683064.

The previous prime is 9897923531. The next prime is 9897923587. The reversal of 9897923534 is 4353297989.

It is a super-2 number, since 2×9897923534² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897923531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122504 + ... + 186555.

It is an arithmetic number, because the mean of its divisors is an integer number (945723600).

Almost surely, 2^9897923534 is an apocalyptic number.

9897923534 is a deficient number, since it is larger than the sum of its proper divisors (5233654066).

9897923534 is a wasteful number, since it uses less digits than its factorization.

9897923534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309367.

The product of its digits is 14696640, while the sum is 59.

The square root of 9897923534 is about 99488.3085291935. The cubic root of 9897923534 is about 2147.0790356814.

The spelling of 9897923534 in words is "nine billion, eight hundred ninety-seven million, nine hundred twenty-three thousand, five hundred thirty-four".