9817950949 has 4 divisors (see below), whose sum is σ = 9819172780. Its totient is φ = 9816729120.

The previous prime is 9817950943. The next prime is 9817950977. The reversal of 9817950949 is 9490597189.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 562164100 + 9255786849 = 23710^2 + 96207^2 .

It is a cyclic number.

It is not a de Polignac number, because 9817950949 - 2⁹ = 9817950437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9817950943) 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, 598782 + ... + 614959.

It is an arithmetic number, because the mean of its divisors is an integer number (2454793195).

Almost surely, 2^9817950949 is an apocalyptic number.

It is an amenable number.

9817950949 is a deficient number, since it is larger than the sum of its proper divisors (1221831).

9817950949 is a wasteful number, since it uses less digits than its factorization.

9817950949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221830.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The square root of 9817950949 is about 99085.5738692571. The cubic root of 9817950949 is about 2141.2807825651.

The spelling of 9817950949 in words is "nine billion, eight hundred seventeen million, nine hundred fifty thousand, nine hundred forty-nine".