9947557137 has 8 divisors (see below), whose sum is σ = 15158182336. Its totient is φ = 5684318352.

The previous prime is 9947557129. The next prime is 9947557153. The reversal of 9947557137 is 7317557499.

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

It is not a de Polignac number, because 9947557137 - 2³ = 9947557129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9947557537) 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, 236846578 + ... + 236846619.

It is an arithmetic number, because the mean of its divisors is an integer number (1894772792).

Almost surely, 2^9947557137 is an apocalyptic number.

It is an amenable number.

9947557137 is a deficient number, since it is larger than the sum of its proper divisors (5210625199).

9947557137 is a wasteful number, since it uses less digits than its factorization.

9947557137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473693207.

The product of its digits is 8334900, while the sum is 57.

The square root of 9947557137 is about 99737.4409988546. The cubic root of 9947557137 is about 2150.6619297376.

The spelling of 9947557137 in words is "nine billion, nine hundred forty-seven million, five hundred fifty-seven thousand, one hundred thirty-seven".