9997902739 has 8 divisors (see below), whose sum is σ = 10908336240. Its totient is φ = 9087724800.

The previous prime is 9997902737. The next prime is 9997902773. The reversal of 9997902739 is 9372097999.

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

It is not a de Polignac number, because 9997902739 - 2¹ = 9997902737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9997902737) 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, 23067 + ... + 143275.

It is an arithmetic number, because the mean of its divisors is an integer number (1363542030).

Almost surely, 2^9997902739 is an apocalyptic number.

9997902739 is a deficient number, since it is larger than the sum of its proper divisors (910433501).

9997902739 is a wasteful number, since it uses less digits than its factorization.

9997902739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127781.

The product of its (nonzero) digits is 17360406, while the sum is 64.

The square root of 9997902739 is about 99989.5131451294. The cubic root of 9997902739 is about 2154.2840657730.

The spelling of 9997902739 in words is "nine billion, nine hundred ninety-seven million, nine hundred two thousand, seven hundred thirty-nine".