9139945 has 8 divisors (see below), whose sum is σ = 11047680. Its totient is φ = 7258800.

The previous prime is 9139943. The next prime is 9139973. The reversal of 9139945 is 5499319.

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

It is not a de Polignac number, because 9139945 - 2¹ = 9139943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9139898 and 9139907.

It is not an unprimeable number, because it can be changed into a prime (9139943) 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, 5881 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (1380960).

Almost surely, 2^9139945 is an apocalyptic number.

It is an amenable number.

9139945 is a deficient number, since it is larger than the sum of its proper divisors (1907735).

9139945 is a wasteful number, since it uses less digits than its factorization.

9139945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13295.

The product of its digits is 43740, while the sum is 40.

The square root of 9139945 is about 3023.2341953610. The cubic root of 9139945 is about 209.0809801953.

The spelling of 9139945 in words is "nine million, one hundred thirty-nine thousand, nine hundred forty-five".