9897049657 has 8 divisors (see below), whose sum is σ = 10813476672. Its totient is φ = 8983405200.

The previous prime is 9897049649. The next prime is 9897049663. The reversal of 9897049657 is 7569407989.

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

It is not a de Polignac number, because 9897049657 - 2³ = 9897049649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897049667) 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, 688194 + ... + 702427.

It is an arithmetic number, because the mean of its divisors is an integer number (1351684584).

Almost surely, 2^9897049657 is an apocalyptic number.

It is an amenable number.

9897049657 is a deficient number, since it is larger than the sum of its proper divisors (916427015).

9897049657 is a wasteful number, since it uses less digits than its factorization.

9897049657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391279.

The product of its (nonzero) digits is 34292160, while the sum is 64.

The square root of 9897049657 is about 99483.9165744896. The cubic root of 9897049657 is about 2147.0158460571.

The spelling of 9897049657 in words is "nine billion, eight hundred ninety-seven million, forty-nine thousand, six hundred fifty-seven".