9161239730 has 8 divisors (see below), whose sum is σ = 16490231532. Its totient is φ = 3664495888.

The previous prime is 9161239727. The next prime is 9161239757. The reversal of 9161239730 is 379321619.

It can be written as a sum of positive squares in 2 ways, for example, as 8855374609 + 305865121 = 94103^2 + 17489^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458061977 + ... + 458061996.

Almost surely, 2^9161239730 is an apocalyptic number.

9161239730 is a deficient number, since it is larger than the sum of its proper divisors (7328991802).

9161239730 is a wasteful number, since it uses less digits than its factorization.

9161239730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916123980.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 9161239730 is about 95714.3653272590. The cubic root of 9161239730 is about 2092.4323025031.

The spelling of 9161239730 in words is "nine billion, one hundred sixty-one million, two hundred thirty-nine thousand, seven hundred thirty".